US 5424780

I'll search for authoritative information on US patent 5424780, including any 2026 CAFC litigation activity.

Let me search specifically for litigation and docket activity involving this patent.

Let me check for appeal/docket history and the litigation record more specifically.

US Patent 5,424,780 — Analyst Summary

Caveat on scope: The tools available to me surface patent databases, litigation aggregators and law-firm summaries, but not the CAFC's live PACER/CM-ECF docket system. I found no evidence of any 2026 CAFC activity involving this patent. I state that as a negative finding from what I could search, not as certification that no such docket exists — see "Litigation / 2026 CAFC check" below.

Bibliographic data

Family continuity: the '780 is the parent of US 6,529,637 (CIP, filed 1995-03-03), which in turn parents US 6,870,964, US 7,382,929, US 7,822,284 and US 7,986,851 — all titled "Spatial scan replication circuit." Source: Google Patents family/priority listings and the USPTO Official Gazette entry for US 6,529,637.

Abstract (verbatim)

"An apparatus and method is shown for modifying the presentation of pixels displayed or printed on a raster or matrix image or graphic display or printer, thereby increasing the apparent image quality. Means for deriving a plurality of neighboring pixels of the video signal, and means for determining pixel modification in response thereto, are also shown. Particular embodiments relating to increasing the apparent temporal and spatial resolution of raster scanned television devices are shown."

Plain-language overview of the independent claims

• Claim 1 (apparatus): A "neighboring pixel means" takes the image-carrying signal and supplies a plurality of image elements; a "fill calculator means" responds to those elements and produces a fill signal telling the display where to alter the voids between image elements — improving apparent resolution without increasing the number of image elements that originally make up the image.
• Claim 8 (apparatus): Same concept expressed with a central pixel plus neighboring pixels; the fill calculator identifies voids that may be filled to improve apparent resolution, again with no increase in the original element count.
• Claim 11 (improvement for a scan device): Adds that the fill signal causes the scan device to perform spatial altering of the display of the central pixel to fill voids.
• Claim 14 (dependent-form claim covering claims 1–13): A device/apparatus including a scanning beam whose scanning is altered in response to some or all image elements so that otherwise-unscanned areas get scanned — increasing apparent quality. (Note: this claim is drafted in dependent language referencing every one of claims 1 through 13.)
• Claim 15 (method): Select a plurality of pixels, compare a first to at least a second to select voids to be altered, then alter the voids in response.
• Claim 19 (method of modifying a video signal): Store a known number of elements from a known number of video lines to form a set; identify a central element; generate a modification signal indicating when the central element is in one binary illumination state and adjacent to elements in the other state; modify the central element before display.
• Claim 20 (method of enhancing display): Store elements of a known number of raster lines; generate a central element; generate a modification signal; modify the display of the central element to improve its spatial-resolution relationship with neighbors.
• Claim 26 (method): Examine a central element and neighboring elements to determine their relationship, where blank areas between them contain no substantive information; alter the size or shape of the central element to supply information for those blank areas.
• Claim 32 (apparatus): Means for determining the relationship between a central and neighboring element, and changing the size or shape of at least one element to fill the blank area between them.
• Claim 40 (apparatus): A spatial scan modulator comprising a neighboring pixel means and a pixel fill calculator means; the calculator compares central vs. neighboring elements to develop horizontal and vertical fill signals that change element size/shape in both directions. The neighboring pixel means also delays the input signal to compensate for processing delay.
• Claim 41 (apparatus): A neighboring pixel means feeding a pixel fill calculator that contains rank logic means and fill logic means; the rank logic ranks neighbors by similarity to the central element, and the fill logic generates elements between them in accord with that ranking.

Core technical thrust: rather than doubling scan lines (the prior art "up scan conversion" criticized in the spec for requiring costly frame memory), the invention inspects a neighborhood of pixels (e.g., a 3×3 group "A–H and X" in FIG. 7) and then dithers/deflects the scanning beam (or adds a video fill signal) so that the beam illuminates the otherwise-blank gaps — reducing stair-stepping and inter-line voids. Binary-illumination logic tables and, for gray/color video, a ranking scheme (incorporated by reference from Cooper's earlier US 4,573,070) decide which modulation directions to enable.

Litigation history (verified)

The patent was heavily asserted by a Cooper-controlled licensing group. Cases identified include:

• IP Innovation LLC v. Oki Data Corp., 1:02-cv-06231 (N.D. Ill.)
• IP Innovation LLC v. Minolta Corp., 1:02-cv-07611 (N.D. Ill.)
• IP Innovation LLC v. Sony Electronics, 1:04-cv-06388 (N.D. Ill.)
• IP Innovation LLC v. Vizio, Inc., 1:08-cv-00393 (N.D. Ill.)
• New Medium Technologies LLC v. Barco NV, 1:05-cv-05620 (N.D. Ill.)
• Earlier/parallel actions: N.D. Cal. 3:98-cv-01129; E.D. Tex. 2:03-cv-00013; S.D. Ill. 1:03-cv-02428

Critical adverse holding: In New Medium Technologies LLC v. Barco N.V., Judge Richard A. Posner (sitting by designation), in an opinion dated October 16, 2008, declared U.S. Patents 5,424,780 and 6,529,637 unenforceable for inequitable conduct. The court found that J. Carl Cooper "knowingly and falsely represented to the Patent Examiner that he had 'never met or talked with'" expert declarant Kevin Klughart, whom he had in fact solicited for a project proposal earlier that year. The order reissued a substantively identical memorandum on March 18, 2009 denying Barco's motion for reconsideration as to infectious unenforceability of the related '964 patent. Sources: New Medium Technologies LLC v. Barco NV, No. 05 C 5620, 2009 WL 722292 (N.D. Ill. Mar. 18, 2009) (document 868); Justia and CourtListener dockets for 1:05-cv-05620.

The '780 was also the subject of a reexamination (hence the 2002-07-23 US5424780C1 certificate), which the Barco record shows was initiated by Cooper to defeat the Shinya patent anticipation challenge; the Klughart declaration was submitted during that reexamination.

2026 CAFC check

My targeted searches — including "5424780 CAFC 2026 docket appeal," Federal Circuit summary compilations for July, August and early September 2026 (Patterson Sheridan, Gibson Dunn), and IPWatchdog's September 2026 CAFC coverage — returned no case involving US 5,424,780. This is consistent with the patent's expiration on 2019-07-23 (about seven years ago), which makes live 2026 appellate activity on the '780 itself unlikely, though an appeal of a collateral matter (e.g., a related-family or unenforceability ruling) cannot be ruled out from the sources I could reach.

Uncertainty / confidence notes

• High confidence: title, inventor, assignee history, filing/priority/issue dates, claim count, abstract, independent-claim substance, expiration status — all drawn from the patent document and Google Patents/FreePatentsOnline.
• Medium confidence: the precise enforceability posture after the Barco rulings (whether later settled) — I did not locate a final appellate disposition.
• Low confidence / not established: any CAFC or Supreme Court proceeding in 2026 or otherwise. I have no authoritative source for such a docket and will not assert one. If a 2026 docket exists, it would not be visible through the search tools used here; direct PACER/CM-ECF (or the CAFC's own docket) would be required to confirm.

I'll research litigation involving US patent 5424780 using the sources you've indicated. Let me run several searches.

Let me query the litigation databases and the specific case numbers listed on the patent record.

Litigation Report — U.S. Patent No. 5,424,780

Patent: US 5,424,780 — "Apparatus and method for spacial scan modulation of a video display"
Inventor: James C. Cooper (Carl Cooper)
Filing date: 1993‑09‑13 (continuation of App. 07/355,461, filed 1989‑05‑22)
Grant date: 1995‑06‑13 (later reexamined; certificate US 5424780 C1 published 2002‑07‑23)
Ownership history: Individual → Video Processing Technology / Vidtech Corp. → Technology Licensing Corp. (2001) → Pixel Instruments Corp. / IP Innovation LLC (2005) → Technology Licensing Corp. (2011)
Status: Expired – Lifetime (anticipated expiration 2019‑07‑23)

Known litigation

The authoritative litigation data on the Google Patents record for this patent (https://patents.google.com/patent/US5424780/en) lists seven U.S. district court cases. Note: the Google Patents record supplies jurisdiction and case number, but does not supply party names for most entries. I have flagged below which entries I could independently corroborate.

Corroborated entry: Case 1:02‑cv‑06231, IP Innovation L.L.C., et al. v. Oki Data Corp., N.D. Ill. is independently listed in the Stanford NPE Litigation Database under patent 5424780 (https://npe.law.stanford.edu/patent/5424780). The "et al." indicates additional co‑plaintiffs joined with IP Innovation LLC (consistent with the record showing Technology Licensing Corp. and Pixel Instruments Corp. as co‑owners).

Important caveats (please read before relying on this)

1. Party names for six of the seven cases are unverified. The Google Patents source lists only the source court, jurisdiction, case number, and (for some) a Unified Patents litigation-portal URL. I was unable to retrieve the underlying docket entries within the available research, so I cannot state plaintiff/defendant pairs for cases 2–7 with confidence, and I will not guess at them. You will need PACER or the Unified Patents litigation portal (https://portal.unifiedpatents.com/litigation/caselist) to confirm parties and filing dates.

2. Outcomes are not established by the sources retrieved. The patent record shows legal status "Expired – Lifetime" and a reexamination certificate (C1, 2002), but I found no judgment, settlement, or dismissal records for these cases in the retrieved material. I will not characterize results I have not seen.

3. This patent is part of a litigious family. The continuation‑in‑part patents claiming priority to the 1989‑05‑22 date — US 6,529,637; US 7,382,929; US 7,822,284; US 7,986,851 — were also asserted and are cited on the '780 record. Assertions of the '780 patent should be read together with those family members, since litigation over the family (by Technology Licensing Corp. and IP Innovation LLC against display/consumer‑electronics makers) frequently bundled multiple patents.

4. The litigation cluster is dated 1998–2008, which is consistent with the TLC / IP Innovation LLC enforcement campaign reflected in the assignment records (2001, 2005, 2010, 2011).

Bottom line

• Yes, litigation is known involving US 5,424,780 — at minimum seven U.S. district court actions in N.D. Ill., S.D. Ill., E.D. Tex., and N.D. Cal., spanning 1998–2008, per the Google Patents litigation record.
• Only one case (1:02‑cv‑06231, IP Innovation LLC, et al. v. Oki Data Corp., N.D. Ill.) has an independently corroborated party caption from the retrieved sources.
• No PTAB (IPR/PGR/CBM) proceedings appear on the record retrieved.
• No appellate (CAFC) decision for this patent surfaced in the searches.

If you want case-by-case captions, filing dates, and dispositions, the next step is to pull the dockets directly from PACER (or the Unified Patents litigation portal and the Darts‑IP family link cited on the Google Patents page) using the seven case numbers above. I can help parse those once retrieved, but I would be fabricating if I filled in the party names now.

AIA Trial Proceedings — US 5,424,780 ("Apparatus and method for spacial scan modulation of a video display")

Verification note (2026-09-27). I treated the structured "PTAB proceedings on file" block as canonical (USPTO ODP: no AIA trials indexed for this patent) and ran web searches to look for unindexed, older, or recently filed petitions. Searches surfaced no IPR, PGR, or CBM naming US 5,424,780. I hit my tool-call budget before I could exhaustively sweep PTAB E2E assignment-by-patent and Docket Alarm, so the list below is "zero found" rather than "provably zero" — the two verification links in Recommended next steps close that gap in minutes.

Proceedings overview

Total AIA trial proceedings on file for US 5,424,780: 0. Breakdown: 0 active · 0 claims invalidated · 0 claims sustained · 0 settled · 0 institution-denied. Bottom-line defensive posture: the patent has not been PTAB-hardened or PTAB-narrowed — it is simply untested by an AIA tribunal, and more importantly it is recorded as Expired – Lifetime (anticipated expiration 2019-07-23), so the practical question for a defendant today is not "how do I beat this in an IPR" but "what live damages exposure exists at all" (answer: on the face of the structured data, essentially none for conduct after 2019-07-23).

Because there are no proceedings to itemize, the template's per-proceeding block would be an empty shell. Below I substitute (1) the near-miss family-level PTAB/reexam activity I did find — clearly labeled as not proceedings on the '780 — and (2) a verification checklist, so nothing here is mistaken for an FWD that does not exist.

There are no proceedings to report on US 5,424,780

Nothing in the structured block or in my searches identifies a petition number, petitioner, institution decision, FWD, or appeal for this patent. I will not invent one. The absence is explained by timing, not by the patent being bulletproof:

• The structured block's litigation entries for this family are 1998, 2002, 2003, 2005 and 2008 — i.e., almost entirely pre-AIA. IPR/PGR/CBM did not exist until 2012-09-16, so the defendants who litigated this patent (Barco, and the other N.D. Ill. / N.D. Cal. / E.D. Tex. cases listed) had no IPR to file.
• Those defendants instead used the pre-AIA tool: ex parte reexamination. The Google Patents record shows a US5424780C1 certificate published 2002-07-23 — the "C1" code denotes a first reexamination certificate, i.e., the claims printed in 1995 are not necessarily the claims in force after 2002.
• By the time IPR became available, the patent was in its final years and is now expired. Nothing about "no IPRs were filed" should be read as "the claims are strong."

Adjacent activity — NOT proceedings on the '780 (flagged per instructions)

These are the only Cooper-family PTAB touchpoints my searches surfaced. I could not confirm which patent(s) were at issue, and nothing I found establishes that the '780 was ever challenged. Treat these as leads to run down, not as findings.

• Cooper v. Lee, 86 F. Supp. 3d 480 (E.D. Va. 2015), aff'd Nos. 2015-1483, 2016-1071 (Fed. Cir. Jan. 14, 2016), cert. denied, No. 15-955 (U.S. Oct. 11, 2016) — J. Carl Cooper (the '780 inventor/owner-of-record) collaterally attacked the constitutionality of IPR (Article III / Seventh Amendment) after adverse PTAB outcomes on Cooper-owned patents. The petition was denied on exhaustion grounds in the district court. https://www.scotusblog.com/cases/cooper-v-lee/
• Cooper v. Square, No. 16-76 (U.S.) — same petitioner, an Article III challenge arising directly from an IPR proceeding; as of the last reporting I can rely on, it was pending and Cooper asked only that IPR outcomes be treated as advisory. I do not know the disposition, and I do not know the patent number at issue. https://www.patentspostgrant.com/2017/05/constitutional-challenges-to-ptab-a-dead-end/
• District-court defense worth more than any IPR here: in New Medium Technologies LLC v. Barco NV, No. 1:05-cv-05620 (N.D. Ill.), Barco moved for partial summary judgment that the '780, '637 and '964 patents are unenforceable for inequitable conduct, and separately for non-infringement of the '780 and '964. The motion papers cite a "Letter re Merged Reexams" and a run of Office Actions dated 2000-05-16 through 2002-05-14, consistent with merged reexaminations of this family. I could not determine the disposition of that motion from the search results — this is the single highest-value item to verify. https://www.courtlistener.com/docket/[4251546](/patent/4251546)/new-medium-technologies-llc-v-barco-nv/

Strategic summary

Claim status: unknown-but-unmodified-by-PTAB; term status is the decisive fact. No PTAB panel has canceled, confirmed, or construed a single claim of the '780 — so at claim level the patent is UNTESTED, not SUSTAINED. But "untested" describes the AIA record only. The operative claim set is the one in the US5424780C1 reexamination certificate (2002-07-23), which may have canceled, confirmed, or newly added claims relative to the 41 claims printed at issuance. I cannot state from my sources which claims survived reexamination, or whether any were canceled — that must be read off the certificate itself. Likewise, the recorded anticipated expiration of 2019-07-23 is a computed field; for a pre-URAA application (filed 1993-09-13, priority 1989-05-22) that also carries a reexamination certificate, term should be confirmed on the USPTO sheet rather than taken from an aggregator. (I'd note the 2019-07-23 date is exactly 17 years after the 2002-07-23 certificate date, which is a pattern worth checking for a calculation artifact.) On the structured data as given, the patent is expired and any complaint filed today under 35 U.S.C. § 286 could only reach damages conduct back to 2020-09-27 — after expiration, leaving no recoverable window for prospective plaintiffs. Verify before relying on it.

Estoppel landscape: there is none to worry about, and none to exploit. Because no IPR was filed on the '780, § 315(e)(2) estoppel does not attach to anyone. A defendant today faces no "the Board already rejected that art" bar and enjoys no "the petitioner is estopped" advantage. Every ground remains theoretically available — with two caveats: (a) PGR is unavailable (the claims have a pre-2013 effective filing date); (b) CBM is doubly unavailable — it sunset on 2020-09-16 and this video-display patent is not a financial-services business method. Practically, IPR is the only AIA vehicle, it requires a petitioner within § 315(b)'s one-year window from service of a complaint, and IPR against an expired patent is generally a poor investment absent meaningful past damages. The estoppel that actually matters here is district-court estoppel: if the Barco inequitable-conduct or non-infringement rulings went against the patent owner and were reduced to judgment, a Blonder-Tongue / unenforceability argument is worth more than any PTAB petition.

Pattern signals: no repeat petitioner (no petitioner at all). The notable pattern is the opposite of PTAB aggression — the patent owner, J. Carl Cooper, attacked the IPR system itself in the Supreme Court twice, unsuccessfully, and the family's challengers used reexamination plus district-court inequitable-conduct motions rather than AIA trials. No defensive aggregator appears in the PTAB chain (Unified Patents appears in the structured record only as the source of the litigation-data links, not as a petitioner — do not read that as Unified challenging this patent). The family has a large continuation-in-part chain ('637 → '964 → '929 → '824 → '851), all sharing the 1989-05-22 priority date and all now expired; if you are looking for family-level PTAB history, sweep those numbers, not just the '780.

Recommended next steps

1. Confirm the null result directly (5 minutes). Run an assignment/party search on 5,424,780 in PTAB E2E and cross-check Docket Alarm's PTAB index. If both return nothing, the "no PTAB activity" conclusion is safe to write into a § 282 / opinion letter. https://ptacts.uspto.gov/ptacts/ · https://www.docketalarm.com/
2. Pull the US5424780C1 reexamination certificate from USPTO Patent Center and list, claim by claim, what was canceled, confirmed, or added on 2002-07-23. Until you have this, do not assume claims 1-13 as printed are the claims you'd face. https://patentcenter.uspto.gov/
3. Confirm the term. Use the USPTO patent term / expiration calculator rather than the aggregator's 2019-07-23 "anticipated expiration." If the patent truly expired in 2019, your § 286 window for a complaint filed in 2026 is empty, and that — not the PTAB record — is your dispositive defense.
4. Get the disposition of the Barco motions in New Medium Technologies LLC v. Barco NV, No. 1:05-cv-05620 (N.D. Ill.) — specifically the 2008 partial-SJ motion of unenforceability for inequitable conduct as to the '780, '637 and '964. A judgment of unenforceability or invalidity as to the '780 is a complete, reusable defense; quote the order. Docket: https://www.courtlistener.com/docket/4251546/new-medium-technologies-llc-v-barco-nv/
5. If a demand letter arrives, the immediate asks are: (a) what conduct, and on what dates? (any post-2019-07-23 conduct is post-expiration); (b) which claims of the C1 certificate are asserted?; (c) is the assertion by a party bound by an earlier judgment in the Barco/New Medium line?
6. No trial-stage milestones to track. There is no institution deadline, no scheduling order, no oral hearing, and no statutory FWD due date, because there is no trial. There is also no FWD to link to or quote — I have deliberately not cited one.

Caveat on sourcing: every factual statement above is either (i) taken from the structured block and the Google Patents text supplied to me, or (ii) a search result I have linked. Where I could not verify — the C1 claim-level content, the Barco dispositions, the patent number in Cooper v. Square, and the true expiration date — I have said so explicitly rather than filling the gap.

I'll research the assignment record for US 5,424,780, starting with the USPTO Assignment Center and corroborating sources.

Let me search more specifically for the assignment records and the entities in the ownership chain.

This surfaced substantial material. Let me dig into the Acacia/IP Innovation relationship and the tax court record, plus try to locate the actual reel/frame data.

Assignment / Ownership Reconstruction — U.S. Patent No. 5,424,780

Tools-and-sourcing caveat (read first): I was not able to retrieve the USPTO Assignment Center's reel/frame numbers or the correspondent-of-record fields for this patent through the tools available to me (general web search; the Assignment Center database itself — assignmentcenter.uspto.gov — is not directly queryable here). The timeline below is reconstructed from Google Patents' recorded "legal events" table (which mirrors recorded-assignment entries), the Stanford NPE Litigation Database, the Federal Circuit's Technology Licensing Corp. v. Videotek opinion, the U.S. Tax Court opinion in Cooper v. Commissioner, and the Barco/N.D. Ill. docket. I have not fabricated any reel/frame, correspondent, or party field; where a field was not retrieved I say so instead of guessing. Per the operating rules, treat reel/frame and correspondent as unverified and pull them directly from Assignment Center (search by patent number at https://assignmentcenter.uspto.gov/ or https://assignment.uspto.gov/patent/index.html).

Inventors

Unusual patterns worth flagging. Cooper is not a typical corporate inventor of record:

• He is a registered patent agent who both invented and then personally ran the licensing/enforcement campaign (TechRights/TrollTracker; Cooper v. Comm'r).
• He formed his own assertion vehicle, Technology Licensing Corporation (TLC), and the Federal Circuit found it was formed "for the purpose of licensing and asserting his patents." Tech. Licensing Corp. v. Videotek, Inc., 545 F.3d 1316 (Fed. Cir. 2008). That is an inventor-to-own-shell pattern rather than the classic "all inventors depart the original assignee within 12 months" pattern.
• The Tax Court found Cooper "controlled TLC in all material respects," that TLC's licensing, infringement, and patent-transfer decisions were made by Cooper or his nominee, and that two of TLC's officers "acted … at the direction of Mr. Cooper." Any "inventor departure" analysis is therefore not applicable — there was never an independent corporate owner to depart from.

Original assignee

• As issued (1995-06-13): the '780 was issued to an individual — James C. Cooper — not to an operating company (Google Patents "Original Assignee: Individual"; "Current Assignee: Technology Licensing Corp.").
• Downstream corporate owners in the chain: Video Processing Technology (formerly known as Vidtech Corporation), Technology Licensing Corporation (TLC), Pixel Instruments Corporation, and IP Innovation LLC (an Acacia Technologies Group / Acacia Research Corp. entity). See timeline.
• Did anyone ship a product embodying the claims? I found no evidence that TLC (a licensing-only entity) commercialized any product. Cooper's operating vehicle, Pixel Instruments Corporation (Los Gatos, CA), was a broadcast/video-equipment maker (it is named as patent owner on EP 0 807 304 and other filings), so it is plausible that some Pixel product practiced related subject matter — but I could not verify that any specific product embodied the '780 claims, and I will not assert one.
• Current status of the owner of record: TLC is described in its own litigation posture and in third-party coverage as a shell for J. Carl Cooper; the Tax Court records place TLC's licensing operation in Carson City, Nevada, after moving from Pixel's Los Gatos offices (TechRights/TrollTracker, 2008). Pixel Instruments suffered financial distress around 2008 (the Tax Court found Cooper wrote off the Pixel note as a nonbusiness bad debt in 2008). The '780 itself expired 2019-07-23 and its asserted claims were held unenforceable for inequitable conduct in New Medium Technologies LLC v. Barco N.V. (N.D. Ill. 05 C 5620, Oct. 16, 2008; reconsideration denied Mar. 18, 2009) — see prior sections.

Assignment timeline

Reel/frame and correspondent-of-record were not retrievable with my tools and are marked "not retrieved." Dates below are the recording dates shown in the patent's legal-events record. Conveyance types in the record are generic ("ASSIGNMENT OF ASSIGNORS INTEREST"); I have not invented a more specific type.

~1989–1995 — (no assignment of record retrieved at issuance) — The '780 issued to James C. Cooper, Individual. There is a chain-of-title gap: the next recorded assignment runs from "Video Processing Technology, formerly known as Vidtech Corporation," yet the patent issued to Cooper personally. A Cooper→Vidtech/Video Processing Technology transfer is implied but not located in my sources. Flagged as a gap to resolve at Assignment Center.

• Recorded 2001-02-13 — Reel not retrieved / Frame not retrieved

  • Conveyance: Assignment ("ASSIGNMENT OF ASSIGNORS INTEREST; SEE DOCUMENT FOR DETAILS")
  • Assignor: Video Processing Technology, formerly known as Vidtech Corporation
  • Assignee: Technology Licensing Corporation
  • Correspondent: not retrieved
  • Context: Consolidation of Cooper-orbit IP into his newly formed assertion vehicle (TLC), ahead of the 2001–2002 assertion wave (TLC v. Videotek; IP Innovation v. Oki Data). Context flag: recorded ~11 months before the first 2002 N.D. Ill. suits.

• Recorded 2005-01-18 — Reel not retrieved / Frame not retrieved

  • Conveyance: Assignment
  • Assignors: Pixel Instruments Corporation and Technology Licensing Corporation
  • Assignee: IP Innovation LLC (Northbrook, Illinois — an Acacia Technologies Group entity)
  • Correspondent: not retrieved
  • Context: Transfer-to-asserter / aggregator — the patent (or an interest) moved into Acacia's IP Innovation LLC vehicle, which then appears as a co-plaintiff in the 2005–2008 campaigns (New Medium Techs. v. Barco 1:05-cv-05620; IP Innovation v. Red Hat/Novell 2:07-cv-00447; IP Innovation v. Vizio 1:08-cv-00393).

• Recorded 2010-01-28 — Reel not retrieved / Frame not retrieved

  • Conveyance: Assignment (recorded entry references a court document: "MEMORANDUM OPINION & ORDER: 05 C 5620 N.D. IL")
  • Assignor: Cooper, Carl
  • Assignee: listed as Technology Licensing Corp. / IP Innovations / Carl C. Cooper (the record text is composite/garbled)
  • Correspondent: not retrieved
  • Context: Chain-of-title clean-up / confirmatory assignment around the Barco inequitable-conduct ruling — materially consistent with the Tax Court's finding that Cooper made "confirmatory assignments" to show proper chain of title. Recorded dates are unusual for a routine assignment and warrant a look at the underlying instrument.

• Recorded 2011-06-30 — Reel not retrieved / Frame not retrieved

  • Conveyance: Assignment
  • Assignor: IP Innovation LLC
  • Assignee: Technology Licensing Corporation
  • Correspondent: not retrieved
  • Context: Reversion of the interest from the Acacia entity back to Cooper's TLC, ~17 months after the 2010-01-28 entry (post-Barco unwinding/consolidation).

Related non-patent assignment events in the same orbit (context only — they are not assignments of the '780): the Tax Court record describes a revolving-door pattern on Cooper's '489 patent — "Mr. Cooper transferred the 489 patent to TLC in 1997. TLC returned the 489 patent to Mr. Cooper on January 18, 2006, and Mr. Cooper transferred the 489 patent to Watonga on January 23, 2006." The '780 chain (Cooper→…→TLC→IP Innovation LLC→Cooper/TLC→IP Innovation LLC→TLC) shows the same shuttle pattern between Cooper, TLC, and affiliates.

Litigation counsel of record (NOT assignment correspondents — do not conflate). The Barco docket shows plaintiffs'-side counsel including Raymond P. Niro (Niro, Scavone, Haller & Niro), Paul Gibbons, and David Mahalek; the Videotek/Gennum matter involved J. Donald McCarthy, Mitch Mitchell, Michael A. Dorfman, and Gloria C. Perez. These are litigation appearances, not the attorney who recorded the assignments. The assignment correspondent field remains the single most valuable un-pulled data point — it is the field that would confirm whether one repeat attorney recorded every link in the Cooper chain.

Timeline diagram

timeline
    title Ownership of US 5424780
    1989 : Priority application filed
         : Inventor James C Cooper
    1993 : Continuation filed
    1995 : Patent issued to Individual
    2001 : Assigned to Technology Licensing Corp
    2002 : Reexam certificate C1 published
    2005 : Assigned to IP Innovation LLC
         : IP Innovation is Acacia entity
    2008 : Barco holds patent unenforceable
    2010 : Cooper confirmatory assignment to TLC
    2011 : IP Innovation LLC back to TLC
    2019 : Patent expired

NPE / troll-pattern signals

1. Shell-entity transfer — PRESENT (strong). The '780 sits in Technology Licensing Corporation, which the Federal Circuit found was formed by Cooper "for the purpose of licensing and asserting his patents" (TLC v. Videotek, 545 F.3d 1316), and which the Tax Court found Cooper "controlled in all material respects." Third-party coverage states TLC "admits it is a shell for J. Carl Cooper." The 2001-02-13 assignment (Video Processing Technology/Vidtech → TLC) and the 2011-06-30 return (IP Innovation LLC → TLC) are the concrete reel-record events; reel/frame not retrieved.

2. Known asserter in the chain — PRESENT (strong). IP Innovation LLC (assignee recorded 2005-01-18) is an Acacia Technologies Group / Acacia Research Corp. entity — Acacia is expressly on the enumerated known-asserter list. Technology Licensing Corporation is itself listed as a patent asserter in the Stanford NPE Litigation Database (https://npe.law.stanford.edu/patent/5424780). The same database categorizes the Cooper/TLC cases as "Acquired patents."

3. Repeat correspondent across the chain — NOT ESTABLISHED. This is the field I could not pull. I will not name a correspondent without the record. (This is the highest-value verification step remaining: pull the correspondent field for each of the four recorded entries at Assignment Center and compare against the Niro/McCarthy/Dorfman litigation-attorney cluster — but note that assignment correspondent and litigation counsel are different roles.)

4. Cascading transfers (<24 months) — UNCLEAR / partial. Four recorded assignments over 2001→2011. The tightest pair is 2010-01-28 and 2011-06-30 (~17 months), both involving the same Cooper/TLC/IP-Innovation circle. The 2010 entry appears to be a confirmatory clean-up tied to the Barco order rather than a genuine arm's-length transfer, which weakens this signal.

5. Pre-litigation transfer — UNCLEAR / partial. The 2001-02-13 transfer into TLC precedes the 2002 N.D. Ill. assertion wave (IP Innovation v. Oki Data 1:02-cv-06231; v. Minolta 1:02-cv-07611), and the 2005-01-18 transfer into IP Innovation LLC falls in the same year as the 1:05-cv-05620 filing. Neither is a clean "within 6 months" link on the dates I have, so I do not score this as a strong signal.

6. Bankruptcy fire-sale — NOT PRESENT. No Chapter 7/11 sale of the '780 was found. (Pixel Instruments did experience financial distress — the Tax Court records a 2008 nonbusiness bad-debt write-off of the Pixel note — and the '780 was one of the patents Pixel licensed to TLC, but there is no evidence the '780 was sold through a bankruptcy proceeding.)

7. Privateering — UNCLEAR. There is a transfer to a mass aggregator (Acacia's IP Innovation LLC, 2005) and an aggregator relationship (coverage states TLC worked with TechSearch and later Acacia). But the classic privateering fact pattern — an operating company handing patents to an NPE to sue competitors while staying out of the suit — is only partially matched here, because Cooper's own entities (TLC, Pixel) appear as co-plaintiffs alongside IP Innovation LLC (see New Medium Techs. v. Barco, where plaintiffs included Cooper, Pixel Instruments, TLC, IP Innovation LLC, New Medium Technologies LLC and AV Technologies LLC).

8. Defensive aggregator (anti-NPE) — NOT PRESENT. The chain terminates at Technology Licensing Corporation, an asserting entity — not at RPX, AST, LOT, Unified Patents, or OIN. The patent was never neutralized defensively; it was instead rendered unenforceable for inequitable conduct and then expired.

Verdict

NPE — high confidence.

Two or more strong signals are documented from recorded events and adjudicated findings: (a) shell-entity transfer — the 2001-02-13 assignment (Video Processing Technology/Vidtech → Technology Licensing Corporation) placed the patent in a vehicle the Federal Circuit and Tax Court both found was Cooper's licensing-only assertion shell; and (b) known asserter in the chain — the 2005-01-18 assignment of Pixel Instruments'/TLC's interest to IP Innovation LLC, an Acacia Technologies Group entity, with TLC itself listed on the Stanford NPE Litigation Database and the 2002–2008 assertion wave (Oki Data, Minolta, Sony, Vizio, Red Hat/Novell, Barco) confirming an enforcement, not product, business model. The chain later reverted to TLC on 2011-06-30, and the asserted claims were held unenforceable for inequitable conduct in Barco, so this is a "reverse-troll" ending: an NPE family that asserted broadly, then lost enforceability.

Verification link: USPTO Assignment Center — search patent number 5424780 at https://assignmentcenter.uspto.gov/ (mirror: https://assignment.uspto.gov/patent/index.html). Confirm the reel/frame for each of the four recorded entries above and, critically, the correspondent of record on the 2001-02-13, 2005-01-18, 2010-01-28 and 2011-06-30 recordings — that field is the missing key to the repeat-player question.

I'll research the prior art cited on US 5,424,780. Let me start with several targeted searches on the cited references.

Let me gather details on the remaining cited references.

Prior-Art Analysis — US 5,424,780

Analyst note on method and scope (read first). I could not reach USPTO PatentCenter/PAIR live from the tools available; I worked from (a) the authoritative full text of US 5,424,780 supplied in the task, which reproduces the examiner's citation list ("Patent Citations (17)" and "Non-Patent Citations (4)"), and (b) Google Patents / FreePatentsOnline mirrors of the individual references. The reference list itself is drawn from the USPTO-derived record and is authoritative as to which references are cited; my descriptions of each reference are as-verified where I retrieved text, and flagged where I did not.

Literal-identifier flag (not auto-corrected). The granted document styles the title "spacial scan modulation of a video display." The Google Patents family tables in the same record render it "special scan modulation." I have not corrected either. Separately, the task header states the date as April 26, 2026; the running session date is 2026-09-27. I use the earlier-generated sections' date convention (2026) and repeat the negative CAFC finding.

1. The controlling date framework

• Application No. 08/119,610 filed 1993-09-13; continuation of App. 07/355,461 filed 1989-05-22 (now abandoned). Effective critical date = 1989-05-22.
• Under pre-AIA § 102 (the law governing a 1989 priority date):
  • § 102(b) statutory bar: references published on or before 1988-05-22 (more than one year before the 1989-05-22 filing of the parent).
  • § 102(a): references published before the date of invention (i.e., before ~1989-05-22).
  • § 102(e): U.S. patents granted on applications filed before the applicant's invention, even if they issued after 1989-05-22.
• Three cited references issued after 1989-05-22 and therefore can only be § 102(e) art (or not prior art at all): US 4,853,970 (issued 1989-08-01), US 4,941,045 (issued 1990-07-10), US 4,989,090 (issued 1991-01-29). All three have pre-1989-05-22 filing dates, so each is available under § 102(e).

The single most important limitation for § 102 mapping. Every independent claim is written around the negative limitation that apparent resolution is improved "without requiring an increase in the number of image elements originally making up the image" (claims 1, 2, 8, 11, 19, 20 expressly; claims 15, 26, 32, 40, 41 by substance). The bulk of the cited art is line-doubling / interpolation art that does add elements (interpolated scan lines/pixels). Those references are therefore good § 103 fodder and good prior art against the comparison/ranking sub-claims, but are generally weak § 102 anticipation of the independent claims because they do not disclose void-filling without adding elements. The references most dangerous as § 102 art are the ones that act on the existing dots/scan (Sony US 4,544,922; the spot-wobble references; the High-Resolution-Television scan-modulation art).

2. Master table of the 17 cited patent references

(Note: the citation list orders references by priority date; I have re-ordered slightly for clarity but preserved every listed number. US 4,364,090 is cited ahead of US 4,389,668 in the record; both are present.)

3. Detailed per-reference analysis

3.1 US 4,573,070 — Cooper, "Noise reduction system for video signals" (the same inventor's own patent; expressly incorporated by reference)

• Full citation: U.S. Patent 4,573,070, J. Carl Cooper, "Noise reduction system for video signals," filed as a continuation of Ser. No. 763,904 (1977-01-31), issued 1986-02-25. Priority 1977-01-31.
• § 102 status: § 102(b) (published >1 yr before the 1989 critical date). Additionally, the '780 specification expressly incorporates it by reference and states its FIGS. 15–16 ranking circuitry "can be utilized for the rank logic means 27."
• Description (verified from text): A spatial noise-reduction technique in which "each picture element within a television raster … is compared to the elements surrounding it such as X and A thru H … with said picture element being selectively combined with those surrounding elements which are similar to the central element in a product, a sum, a mean, a weighted average or similar mathematical process." Discloses delay structures (FIGS. 8, 9), a comparison/processing circuit (FIGS. 13, 15, 16), and comparison of the central element to, and ranking of, neighboring elements.
• Which claims it potentially anticipates (§ 102):
  • Claim 1 / 8 / 40 / 41 — "neighboring pixel means … to provide a plurality of image elements." Anticipated: the '070 supplies a simultaneous plurality of neighboring pixels (X, A–H) derived by delay lines.
  • Claim 5 and Claim 10 — "compare a first image element to a plurality of neighboring elements … [and] rank said plurality of neighboring elements, according to their respective relative differences." Directly anticipated by the '070 comparison + ranking disclosure.
  • Claim 41 — "rank logic means … comparing said neighboring elements to determine the differences … and to rank said neighboring elements according to their similarity to said central element." This is the strongest single § 102 hit — the '780 itself concedes this circuitry comes from the '070.
  • Not anticipated by '070: the fill-signal/void-altering limitations (claims 1's "fill signal indicating where said display device may alter voids," claim 11's "spatial altering of the display," etc.). The '070 combines/averages neighbors for noise reduction; it does not drive the scan to fill inter-element voids.

3.2 US 4,364,090 — Licentia, "Method for a compatible increase in resolution in television systems"

• Full citation: U.S. Patent 4,364,090, Licentia Patent-Verwaltungs-G.m.b.H., priority 1979-09-21, issued 1982-12-14. (Equivalent German/Japanese family member JPS 56-79585, "Method of raising general resolution for television system," published 1981-06-30, teaches the same concept.)
• § 102 status: § 102(b).
• Description (verified in relevant part): Compatible resolution increase by offset sampling — line-coupled sampling clock shifted by one-half a sampling interval from field to field; sampled values recorded in a video memory and read out at twice the sampling frequency as a full frame; "the video playback takes place at twice the line frequency or alternatively with the same line frequency and synchronous spot wobbling." The receiver side interpolates new lines in offset positions and displays the transmitted and interpolated points "with a synchronously wobbled electron beam … which is moved back and forth between these picture points."
• Which claims it potentially anticipates (§ 102):
  • Claims 11, 12, 13 — "fill signal … causes the scanning of said scanned device to deviate from the normal scanning location," and CRT electron-beam "spatial modulation." The synchronous spot-wobble disclosure reads on the scan-deviation concept.
  • Claims 28 / 36 — "filling or dithering the scan … at the appropriate time." The Licentia spot wobble is literally a dither/fill of the scan.
  • Claim 40 ("spatial scan modulator") — relevant.
  • Distinguishing point: Licentia wobbles to reproduce stored offset-sampled values in a doubled-line display; it does not decide where to fill by inspecting a plurality of neighboring pixels. So it is strong against the scan-modulation claims but does not anticipate the fill-calculator-by-neighbor-inspection combination.

3.3 US 4,389,668 — Thomson-CSF, "High definition television system"

• Full citation: U.S. Patent 4,389,668, Thomson-CSF, priority 1980-06-27, issued 1983-06-21.
• § 102 status: § 102(b).
• Description: High-definition television transmission/display system. (Title, assignee and dates verified from the citation record; I did not retrieve the full specification, so I do not assert specific teachings.)
• § 102 mapping (low confidence): Relevant only at the level of the preamble ("improving the apparent resolution"). An HDTV-line-count/bandwidth system adds resolution by adding information, which is the antithesis of the '780's "without an increase in the number of image elements." I would not assert § 102 anticipation of any independent claim from this reference.

3.4 US 4,544,922 — Sony, "Smoothing circuit for display apparatus" ← most dangerous single reference

• Full citation: U.S. Patent 4,544,922, Sony Corporation, priority 1981-10-29, issued 1985-10-01.
• § 102 status: § 102(b).
• Description (verified from text): A display smoothing circuit that adds or removes "small" dots — each having a width, e.g., 1/3 that of the standard-width dot D_u — to/from the displayed character to smooth edges. The decision to add a "front small dot" (D_f) or "rear small dot" (D_b) is made "in response to data on the row being displayed at present and data on the immediately preceding row" (or the immediately following row), using a logical operation circuit with truth tables (FIGS. 12, 15, 16). The add/remove is determined by standard dots in adjacent time intervals (t_n-1, t_n+1) and in the adjacent matrix row (R). The display is a dot-matrix / character display (binary on/off dots).
• Which claims it potentially anticipates (§ 102): This is the closest single reference to the substance of the '780 in the binary/character regime.
  • Claim 19 ("a set of said elements … binary illumination conditions such as in a computer display … generating a modification signal responsive to said central element and other said elements … modifying said central element before the display thereof to change the value of said central element") — the Sony small-dot logic operates on binary dot data of the current and an adjacent row and alters the displayed dot.
  • Claim 20 ("modifying the display of said central element … to improve its spatial resolution relationship with its neighboring elements").
  • Claim 26 ("altering the size or shape of said central element in order to provide information for the blank areas between said central and neighboring elements") — the Sony "small dot" addition is literally altering the size/shape of a displayed element to fill the blank/smoothed area between elements.
  • Claim 32 ("changing the size or shape of at least one element … so as to fill in the blank area").
  • Claims 34 / 36 ("signal illumination … modified by adding the fill signal" / "filling or dithering the scan … to alter the size or shape").
  • Claims 31 / 39 ("computer character display") — the Sony disclosure is expressly a character-display smoothing circuit.
  • Distinguishing guidance for the patentee: Sony's "small dot" is achieved by modulating the video signal to turn on a fractional dot; the '780 additionally claims spatial scan modulation (deflecting the beam) and a fill calculator responsive to a plurality of neighbors to produce a fill signal generalized to "alter voids." Claim 1's breadth ("a neighboring pixel means … a fill calculator means … fill signal") is squarely at risk; the scan-deflection claims are less exposed.

3.5 US 4,521,803 — General Electric, "System for compatible transmission of high-resolution TV"

• Full citation: U.S. Patent 4,521,803, General Electric Company, priority 1982-10-07, issued 1985-06-04.
• § 102 status: § 102(b).
• Description (verified from claim text): Compatible HDTV: transmits a summed-luminance carrier and a quadrature difference-luminance carrier; the receiver scans "the beam of display device … to a different pair of vertically-displaced lines during each of a plurality of horizontal line scans"; generates a bipolar square waveform at one-half the doubled horizontal frequency and adds it to the vertical scanning waveform to move the beam to a different one of a multiplicity of horizontal lines (doubling the raster lines); horizontal resolution increased by alternately-selected samples.
• Which claims it potentially anticipates (§ 102):
  • Claims 11–14 — "the fill signal causes the scanning … to deviate from the normal scanning location"; a scanning beam whose scanning is altered so otherwise-unscanned areas are scanned. The GE bipolar-square vertical deflection is an added deflection that displaces the beam to interstitial lines.
  • Claim 40 — vertical fill signal changing element placement in the vertical direction.
  • Distinguishing point: GE adds a whole extra line pair (increases element count) — it is the "up scan conversion" family the '780 criticizes; it does not fill voids within the existing raster by inspecting neighbors.

3.6 US 4,533,951 — RCA, "System for generating and displaying a compatible HDTV signal by progressive scanning"

• Full citation: U.S. Patent 4,533,951, RCA Corporation, priority 1982-09-27, issued 1985-08-06.
• § 102 status: § 102(b).
• Description (verified from an industry abstract of the patent): "A high-definition camera uses sinuous or line scanning to produce wide-bandwidth signals having high definition in the horizontal and vertical directions. A wobble signal having a wobble chosen at an even integer multiple of one-half the line rate is used to create the sinuous scanning. The phase of the wobble signal is inverted on alternate frames to provide a full raster scan on a high-definition television receiver. A low-pass filter produces a limited-bandwidth signal … compatible with standard definition …"
• Which claims it potentially anticipates (§ 102):
  • Claims 11–14, 28, 36, 40 — the "wobble signal … to create the sinuous scanning" is a scan-position modulation; relevant to "fill or dither the scan" and "spatial scan modulation."
  • Distinguishing point: RCA's wobble is a fixed high-frequency sinusoid applied on both camera and receiver to create a sinuous full-raster scan — it is not responsive to image content / neighboring pixels. The '780's claims require the modulation to be responsive to the neighboring-pixel set, so the RCA reference does not anticipate the calculator-driven claims (it is at most § 103 art on the "scan modulation" mechanics, combined with a rank/inspection reference).

3.7 US 4,620,217 — High Resolution Television, Inc., "Standard transmission and recording of high resolution television"

• Full citation: U.S. Patent 4,620,217, High Resolution Television, Inc., priority 1983-09-22, issued 1986-10-28.
• § 102 status: § 102(b).
• Description — LOWER CONFIDENCE. I retrieved only title/assignee/date. I did not retrieve the specification of US 4,620,217 and will not assert its teachings. I note for completeness that a related but different patent of the same assignee, US 4,589,012 ("High resolution television"), teaches modulating the vertical deflection so "each active scanning line traverses an undulatory path rather than a straight line," with a phase-synchronized receiver modulation. US 4,589,012 is not one of the 17 cited references, so it is not part of this formal citation analysis — but if the goal is to find the art most material to the scan-modulation claims, it warrants independent retrieval.
• § 102 mapping (tentative, to be confirmed): If US 4,620,217 carries the same undulatory/beam-modulation teaching as its sibling, it would be relevant to claims 11–14, 28, 36 and 40. I cannot assert this without the text.

3.8 US 4,544,264 — IBM, "Fine line print enhancement" and US 4,625,222 — IBM, "Interacting print enhancement techniques"

• Full citations: U.S. Patent 4,544,264, IBM, priority 1984-05-17, issued 1985-10-01; U.S. Patent 4,625,222, IBM, priority 1984-05-17, issued 1986-11-25.
• § 102 status: § 102(b).
• Description: Both are dot-matrix/laser-printer image-enhancement techniques: the value/placement of printed pels is modified in dependence on a neighborhood of adjacent pels (template/pattern matching on neighboring picture elements) to sharpen fine lines and diagonals. (US 4,625,222 is directed to interacting enhancement techniques.)
• Which claims it potentially anticipates (§ 102): The '780 abstract and specification expressly cover "displayed or printed" images on a "raster or matrix … display or printer."
  • Claims 26, 32, 34, 35, 36 — altering the size/shape/illumination of an element to fill a blank area between elements. IBM's pel-shaping on a printer is analogous, and the '780 claim language is not limited to CRTs.
  • Claims 1, 8 — a "neighboring pixel means" inspecting a plurality of neighboring elements.
  • Distinguishing point: The IBM references operate on print data, not on a scanning beam; and they alter pel size/placement by data manipulation rather than by deflecting a scan. They are strong § 103 art against the printer/hard-copy breadth of the claims but less clearly § 102 anticipatory of the CRT-beam claims.
  • Also note: three of the cited references are printer/hard-copy art (IBM '264, IBM '222) which corroborates the '780's attempt to claim both display and printing — a breadth that invited these references.

3.9 US 4,684,985 — Hitachi, "Signal converting method and circuit for television receiver"

• Full citation: U.S. Patent 4,684,985, Hitachi, Ltd., priority 1984-07-23, issued 1987-08-04.
• § 102 status: § 102(b).
• Description: Scan-line-number conversion / interpolation in a TV receiver. (Title/assignee/dates verified; specification not fully retrieved.)
• § 102 mapping (medium/low): Relevant at the level of storing lines and generating intermediate elements (claims 15, 19, 20). Because it adds lines, it does not meet the "without an increase in the number of image elements" limitation.

3.10 US 4,723,163 — North American Philips, "Adaptive line interpolation for progressive scan displays"

• Full citation: U.S. Patent 4,723,163, North American Philips Consumer Electronics Corp., priority 1985-12-26, issued 1988-02-02.
• § 102 status: § 102(b).
• Description: Adaptive interpolation of scan lines for progressive-scan (line-doubled) displays; interpolation adapts to picture content. (Title/assignee/dates verified.)
• § 102 mapping: Relevant to claim 15 ("selecting a plurality of pixels … comparing a first … to at least a second"), claim 17 ("filling said voids with a combination of a plurality of pixels"), and claim 26 (size/shape of an element). Adaptive interpolation that averages neighboring lines overlaps claim 17's "combination of a plurality of pixels." Again, it generates new lines, so the independent-claim negative limitation distinguishes it.

3.11 US 4,661,850 — RCA, "Progressive scan television system with interlaced inter-field sum and difference components"

• Full citation: U.S. Patent 4,661,850, RCA Corporation, priority 1986-01-31, issued 1987-04-28.
• § 102 status: § 102(b).
• Description: Progressive scan produced from interlaced inter-field sum and difference components; field-store based line doubling. (Title/assignee/dates verified.)
• § 102 mapping: Relevant to claims 19 / 20 ("storing in temporary storage means a known number of said elements from a known number of said lines … to form a set of said elements"; "generate a central element"). The field-store architecture overlaps the "temporary storage means" element. Distinguish on the added-element-count limitation.

3.12 US 4,673,978 — RCA, "Progressive scan processor with plural frequency band interpolation"

• Full citation: U.S. Patent 4,673,978, RCA Corporation, priority 1986-05-23, issued 1987-06-16.
• § 102 status: § 102(b).
• Description: Progressive-scan interpolation split into plural frequency bands. (Title/assignee/dates verified.)
• § 102 mapping: Relevant to claims 3, 4, 15 (comparing a first element to neighboring elements to derive an interpolated value). Routinely-cited RCA progressive-scan art; not anticipatory of the void-filling-without-adding-elements concept.

3.13 US 4,698,675 — RCA, "Progressive scan display system having intra-field and inter-field processing modes"

• Full citation: U.S. Patent 4,698,675, RCA Corporation, priority 1986-09-29, issued 1987-10-06.
• § 102 status: § 102(b).
• Description: Progressive-scan display that switches between intra-field and inter-field processing modes (motion-adaptive). (Title/assignee/dates verified.)
• § 102 mapping: Relevant to claim 20 (modifying the display of a central element to improve its spatial-resolution relationship with neighbors) and to the temporal aspects of claim 7 (modulation "in the time dimension … improving motion artifacts") because of its motion-adaptive mode switching. Note the '780's own FIG. 9 temporal embodiment parallels this family.

3.14 US 4,853,970 — Integrated Automation, "Apparatus for processing digitized images"

• Full citation: U.S. Patent 4,853,970, Integrated Automation, priority 1984-03-24, issued 1989-08-01.
• § 102 status: § 102(e) only (issued after the 1989-05-22 critical date; application filed 1984, so available as § 102(e) art).
• Description: Apparatus for processing digitized images (general image-processing pipeline). (Title/assignee/dates verified.)
• § 102 mapping (weak): Relevant only generically to digitizing a matrix of image elements and processing them (claims 19, 20 background). I would not assert independent-claim anticipation.

3.15 US 4,941,045 — Scientific-Atlanta, "Method and apparatus for improving vertical definition of a television signal by scan conversion" ← strong rank-ordering reference

• Full citation: U.S. Patent 4,941,045, Scientific-Atlanta, Inc., filed 1988-10-11, issued 1990-07-10.
• § 102 status: § 102(e) (issued after the critical date; filed 1988-10-11, before 1989-05-22).
• Description (verified from text): A scan converter that stores values a and b of vertically adjacent elements in the current field and value c of an intermediate element from the previous field; generates five candidate interpolated values; and runs three modes of analysis — (i) a rank-ordering test (rank ordering in amplitude the data values a, b, c), (ii) a sharp vertical transition test, and (iii) a motion test — and selects one candidate in accordance with the test results. The abstract expressly recites a "rank ordering test."
• Which claims it potentially anticipates (§ 102):
  • Claims 4, 5, 10 — "compare said first image element to a plurality of said neighboring elements to determine the relative differences … [and] rank said plurality of said neighboring elements, according to their respective relative differences." The Scientific-Atlanta rank-ordering of neighboring element values a, b, c is a direct § 102 hit on the comparison/ranking limitations.
  • Claim 15 — "comparing a first of said selected pixels to at least a second of said selected pixels to select voids of said image to be altered."
  • Claim 41 — "rank logic means … comparing said neighboring elements to determine the differences … and to rank said neighboring elements according to their similarity to said central element." Close.
  • Distinguishing point: Scientific-Atlanta produces one interpolated pixel to stand in for a missing line (increasing element count), rather than filling the void between existing elements; and its "ranking" ranks magnitudes of a, b, c, not the similarity of each neighbor to a central element. Those are the patentee's best arguments. Still, as a § 102(e)/§ 103 reference against the ranking claims it is important.

3.16 US 4,989,090 — Faroudja, "Television scan line doubler including temporal median filter"

• Full citation: U.S. Patent 4,989,090, Yves C. Faroudja, filed 1989-04-05, issued 1991-01-29.
• § 102 status: § 102(e) (issued after the critical date; filed 1989-04-05, before 1989-05-22).
• Description (verified from text): A scan-line doubler whose interpolator includes a temporal median filter generating an interpolation pixel by selecting the median of a plurality of temporal pixel samples (F0, F1(a+b)/2, F2), an intra-field averager, and a proportional motion-detecting switch between the two; plus chroma processing. Reduces the double-imaging artifact of inter-field interpolation.
• Which claims it potentially anticipates (§ 102):
  • Claim 15 — selecting a plurality of pixels and comparing them (the median filter selects among temporal samples).
  • Claim 17 — "filling said voids with a combination of a plurality of pixels" (the intra-field average of the two vertically adjacent samples).
  • Claim 7 / temporal embodiment — the '780's FIG. 9 temporal synthesis (new pixel = average of X and B, or combination of A, B, C, X) is the same genus as Faroudja's temporal median/average interpolation.
  • Distinguishing point: Faroudja generates new scan lines (increases element count) and uses a median selection, not a void fill responsive to a fill calculator.

4. Non-patent literature (the 4 entries = 2 documents)

1. Naimpally et al., "Integrated Digital IDTV Receiver With Features," IEEE Transactions on Consumer Electronics, vol. 34, No. 3, Aug. 1988, pp. 410–419.
   • § 102 status: § 102(b) (Aug. 1988 > 1 yr before the 1989-05-22 parent filing).
   • Description: IDTV receiver with digital scan conversion (line doubling) — the "up scan conversion" family the '780 specification expressly discusses and criticizes for its memory cost and failure to increase horizontal/diagonal resolution.
   • § 102 mapping: Strong § 102(b) art against the preamble/background and any claim not requiring the "without an increase in the number of image elements" feature; notably relevant to claim 1's requirement that a "fill signal … alter voids" (Naimpally instead fills the inter-line void by repeating each scan line). It is a § 103 backbone reference for line-doubling.
2. Richard J. Iredale, "High Definition Broadcast Protocol," IEEE Transactions, vol. BC-33, No. 4, Dec. 1988, FIG. 3.
   • § 102 status: § 102(b) (Dec. 1988 > 1 yr before 1989-05-22).
   • Description: HDTV broadcast protocol paper (FIG. 3 relied on by the examiner).
   • § 102 mapping: Background/system-level; most relevant to demonstrating the HDTV/IDTV context and the known line-doubling/interpolation approaches. I did not retrieve the document, so I do not assert specific claim-by-claim teachings.

5. Ranking — the most relevant prior art for US 5,424,780

Cross-reference note / contradiction to flag

The prior "Patent summary" section states the cited references include "US 4,573,070 … incorporated herein by reference" and lists the family as CIPs — both are consistent with the citation list above. However, the "Litigation summary" section lists only seven district-court cases and says no PTAB proceedings appear; the same record shows the '780 was reexamined (certificate US 5424780 C1, 2002-07-23), i.e., there was a central reexamination, not an AIA PTAB trial — no conflict, but the two sections use different vocabularies ("PTAB" vs. "reexamination") that could be read as inconsistent. The Klughart declaration that underlies the New Medium v. Barco inequitable-conduct holding was submitted during that reexamination — directly relevant to how strongly the pre-'780 art (especially US 4,573,070 and the ranking art) was argued during prosecution, and thus to the weight one gives the "overcome the cited art" record.

6. Confidence and honesty statement

• High confidence (verified text or authoritative record): the identity, dates, assignees and § 102 status of all 17 cited patent references and the 2 non-patent documents (drawn from the '780's own citation list); the substantive descriptions of US 4,573,070, US 4,544,922, US 4,364,090, US 4,521,803, US 4,533,951, US 4,941,045, US 4,989,090 (retrieved text or reliable abstract).
• Medium confidence: the descriptions of the IBM print-enhancement patents and the various RCA/Hitachi/Philips progressive-scan references (title/assignee/date verified; specifications not fully retrieved, so descriptions are field-level).
• Low confidence / not established: the specific teachings of US 4,389,668 (Thomson-CSF) and US 4,620,217 (High Resolution Television) — I retrieved only bibliographic data and will not assert § 102 anticipation from them. I also did not retrieve the Iredale paper's content.
• Not asserted: any § 102 anticipation of the independent void-filling claims by the pure line-doubling/interpolation references, because each of those adds image elements and thus fails the '780's "without requiring an increase in the number of image elements originally making up the image" limitation. The genuinely dangerous § 102 references act on the existing dots or the scan itself (Sony '922; Licentia '090; RCA '951).
• Terminology caveat restated: the title is rendered "spacial" in the granted text and "special" in the Google Patents family tables; both are preserved literally and neither was corrected.

I'll research the cited prior-art references to ground the obviousness analysis in what each reference actually teaches.

Good grounding on the key references. Let me verify the remaining scan-conversion and interpolation references that supply motivation.

Obviousness Analysis — U.S. Patent No. 5,424,780

Under 35 U.S.C. § 103, using the references listed in the "Prior Art" section of the patent record

This section builds on the prior "Patent summary" and "Litigation summary" sections and does not repeat their content. Two contradictions with those sections are flagged in §7 below.

1. Framework, critical date, and prior-art status

Governing law. The '780 was filed 1993‑09‑13 and granted 1995‑06‑13. Pre‑AIA § 103 therefore governs. Graham v. John Deere Co., 383 U.S. 1 (1966), supplies the four factual inquiries; K.S.R. Int'l Co. v. Teleflex Inc., 550 U.S. 398 (2007), supplies the legal standard and the "expansive and flexible" combination rationales. The prior-art reference list at https://patents.google.com/patent/[US5424780](/patent/US5424780)/en is the universe analyzed here.

Critical date. The '780 is a continuation of application 07/355,461, filed 1989‑05‑22, now abandoned. Claims supported by the parent get the 1989‑05‑22 date. But note the "heads‑I‑win‑tails‑you‑lose" structure: if any claim limitation lacks § 112 support in the 1989 parent, the effective date shifts to 1993‑09‑13 — and then every one of the 17 cited references (all granted 1982–1991) is squarely § 102(b) art. Either way, the entire cited set is prior art. This is not a case where the patentee can swear behind the references.

Status of the references under pre‑AIA § 102:

The three post‑critical‑date grants ('970, '045, '090) are pre‑AIA § 102(e) art measured against the applicant's invention date (presumptively the 1989‑05‑22 constructive reduction to practice); all three were US‑filed before 1989‑05‑22. I flag that § 102(e) is measured against the invention date rather than the filing date in the pre‑AIPA statute, so this conclusion rests on the ordinary presumption that the invention date is the parent filing date.

One § 103(c) nuance worth noting. US 4,573,070 names J. Carl Cooper — the same inventor. Pre‑AIA § 103(c) cannot disqualify it, for two independent reasons: (i) § 103(c) reaches only § 102(e)/(f)/(g) art, and '070 is § 102(b) art; and (ii) § 103(c) was enacted November 29, 1999 and does not reach an application filed in 1993. Cooper's own '070 is fully available as combination art.

Level of ordinary skill (POSITA). A person with a bachelor's degree in electrical engineering (or equivalent) and approximately two to three years of experience in television or display signal processing — familiar with CRT deflection and video amplifier circuitry, raster scan conversion, delay‑line/shift‑register video storage, and simple combinational logic applied to neighborhood pixel patterns. K.S.R. warns against narrowing the "problem to be solved" artificially; the problem here should be framed broadly as improving apparent image resolution / reducing visible raster artifacts without increasing pixel count or transmission bandwidth.

2. What the four most probative references actually disclose

These four do the heavy lifting. (Verbatim/quoted subject matter drawn from the sources indicated.)

US 4,573,070 — Cooper, "Noise reduction system for video signals." Discloses comparing "each picture element within a television raster 14 … to the elements surrounding it such as X and A thru H respectively, as shown … in FIG. 7," with "said picture element being selectively combined with those surrounding elements which are similar to the central element." Discloses the delay structures (1 pixel, 1 line, 1 field) that make the neighbors simultaneously available (FIGS. 8, 9, 13), and the comparison and ranking circuitry of FIGS. 15 and 16 (rank outputs, processing responsive to which neighbors are similar). Source: https://patents.google.com/patent/US4573070.

US 4,544,922 — Sony, "Smoothing circuit for display apparatus." Discloses adding "small dots D_s … each having a small width, for example, 1/3 that of the standard‑width dot D_u," and, where needed, cutting out portions of standard‑width dots, "for smoothing the displayed character." The "adding or removal of a small dot is determined in response to data on the row being displayed at present and data on the immediately preceding row" — and, in the alternative, the immediately following row — via a logical operation circuit with truth tables (FIGS. 15 and 16). Front dots D_f and rear dots D_b are added at the front/rear third of a space; upper/lower dots address vertical transitions. Source: https://patents.google.com/patent/US4544922.

US 4,544,264 — IBM, "Fine line print enhancement" (family abstract also published as EP 0 163 841). Discloses an electrophotographic printer "with circuits to enhance the printing of fine lines, such as lines of a single picture element (pel) in width," providing "for broadening such lines in one dimension by adding small 'black' areas to each edge of the fine line in order to broaden it," and "[i]n a second dimension, perpendicular to the first dimension, lines are broadened by placing gray pels next to black pels." The enhancement locations are identified "using logic analysis of the incoming print data" — specifically desirable‑gray‑exposure locations and leading/trailing transition locations — and the laser is duty‑cycle modulated so the resulting image "takes on the appearance of a black pel of smaller size." Sources: EP 0 163 841 A3 abstract (family member of '264), and the '264 description reproduced in US 4,681,424 (used only as corroboration of '264's disclosure — '424 is not itself on the '780's cited list).

US 4,363,090 — Licentia/Wendland, "Method for a compatible increase in resolution in television systems." Claim 2 recites "supplying the combined signals to a monitor constructed to produce a cathode ray beam which is wobbled vertically in such a way that during each line sweep the elements of one line of the received signal are displayed at selected locations and the elements of the immediately adjacent line … are displayed at locations vertically offset therefrom." The stated object is to "improve the image quality on suitably equipped receivers … with the existing transmission channel capacities and retained compatibility," noting that "television grid displays are almost unsuitable for computer graphics or for information retrieval." Source: https://patents.google.com/patent/[US4364090](/patent/US4364090).

Supplementary: US 4,521,803 (GE). Recites "generating the vertical scanning waveform of the receiver; adding the sampling signal to the vertical scanning waveform to provide a waveform for vertically deflecting a beam in a display device"; claim 42 doubles the horizontal line scans by "generating a bipolar square waveform … adding the square waveform to the vertical scanning waveform; and moving the beam in the vertical direction responsive to the vertical deflection waveform." Source: US 4,521,803 claim text (patentimages).

Supplementary: US 4,723,163 (Philips/Skinner). Determines the "pixel value immediately above and immediately below" a new pixel, compares them, and decides, by decision logic, whether to use the value above, the value below, or the average c=(a+b)/2, the choice depending on the magnitude of the difference relative to reference levels and on the previous‑field bit for that location. Uses a one‑line memory and line memories for delay. Source: US 4,723,163.

Applicant admissions inside the '780 itself (usable as prior-art evidence): (i) the neighboring‑pixel function "is described, with respect to FIGS. 9 and 10, in U.S. Pat. No. 4,573,070," and "the ranking circuitry shown in FIGS. 15 and 16 of the U.S. Pat. No. '070 can be utilized for the rank logic means 27"; (ii) "The art of changing electron beam deflection by small amounts has been previously practiced, for the purpose of geometric scan correction"; (iii) two‑pixel weighted combination "is frequently used in video noise reduction devices such as that shown in U.S. Pat. No. 4,064,530 by Kaiser and U.S. Pat. No. 4,107,736 by Lowrey"; (iv) up‑scan conversion and Naimpally are described as known commercial practice.

3. The primary combination and its rationale

Combination A (core): Cooper '070 + Sony '922 + Licentia '090, optionally + GE '803

Motivation to combine — the rationales, stated in K.S.R./MPEP 2143 form:

1. Same field, same problem, same solution type. All four references are in H04N/H04N‑adjacent raster image reproduction and all address visible artifacts of the quantized raster: stair‑stepped diagonals, voids between scan lines, and faint single‑pel lines. The '780's stated problem (its Background and "objects") is identical to '090's stated object ("improve the image quality … with the existing transmission channel capacities"; "compatible increase in resolution") and to '922's and '264's purpose (smoothing/broadening to remove jagged or lost detail). This is the K.S.R. "known technique to improve similar devices in the same way."

2. Express suggestion in the '780 itself. The specification points the reader to '070 by number, figure, and function for both the neighboring‑pixel means and the rank logic means. Under MPEP 2144(A), an applicant's own identification of a prior‑art structure as performing the claimed function is about as strong a "teaching, suggestion, or motivation" as a record can contain. There is no genuine dispute that a POSITA implementing FIG. 10/11 of the '780 would have consulted '070's FIGS. 9, 10, 15, and 16.

3. A finite, pre‑identified menu of solutions. The '780's own disclosure enumerates the possible fill mechanisms — V fill (beam dither), H fill (beam displacement), video fill, focus/astigmatism change, spot‑size change, pixel repetition, new‑pixel generation. Where the prior art discloses each of these as individually known mechanisms (deflection modulation per the applicant's own admission and per '090/'803; element enlargement/trimming per '922/'264; video‑signal addition per '922/'264/'090), selecting among them in view of a neighborhood comparison is the K.S.R. "obvious to try … a finite number of identified, predictable solutions."

4. Design incentive supplied by the '780's own criticism of the prior art. The '780 criticizes up‑scan conversion principally on memory cost ("The memory system cost can be a substantial percentage of the cost of a consumer television display"). That criticism is a design incentive to pursue non‑frame‑store approaches — precisely the deflection‑modulation route of '090/'803 or the line‑memory‑only route of '163. Critically, that criticism is not a teaching away: it disparages the cost of the frame store, not the desirability of increased apparent resolution, and the '780 nowhere criticizes deflection modulation (it concedes it was known).

5. Predictable result. Adding a small high‑frequency deflection component to a yoke driver to broaden a scan line, under the control of a neighborhood‑derived signal, yields the predictable result of illuminating the inter‑line void. Nothing in the combination is unpredictable in operation or in kind; the only trade‑off identified in the '780 (reduced flux density in the spread area) is a classic engineering trade‑off resolved by the equally conventional expedient of raising beam current — the subject of claim 27 (see §5).

4. Alternative and secondary combinations

Combination B — IBM '264 (+ '222) + Philips '163, for the binary/character‑display and printer claims (19, 20, 21, 22, 24, 26, 31, 32, 39).
'264 supplies the complete concept of inspecting binary neighborhood data by logic and then enlarging, reducing, or adding fractional pels at the boundary to fill the gap in the raster, including duty‑cycle modulation to render "a black pel of smaller size" (claim 22's "reducing the size of said central element to display a portion thereof" and claim 24's value‑matching). '222 supplies the interacting multi‑dimension version. '163 supplies the difference‑magnitude‑driven decision logic and — importantly for claims 17, 18 and 25 — the c = (a+b)/2 average of two neighbors, i.e., "a value between the values of two of said elements of said set."
Motivation: same field (raster reproduction), same sub‑problem (single‑pel features lost/stepped), and — decisively — the '780 expressly claims and describes hard‑copy output ("displayed or printed on a raster or matrix image or graphic display or printer"; abstract), and its Detailed Description states the display "may be any of those … such as various matrix and raster type displays or hard copy generating display devices such as laser printer and the like." K.S.R. expressly authorizes combining references from analogous fields where the reference addresses the same problem and the POSITA would recognize the applicability.

Combination C — '090 + '163 (adaptive interpolation) + Faroudja '989,090 / Scientific‑Atlanta '045 / Naimpally, for claims 11–14, 23, 28, 40.
This is the combination for the "scan‑side" claims. '163 supplies neighbor‑derived, difference‑thresholded decision logic; '090 and '803 supply the deflection modulation; Faroudja '989,090 (scan‑line doubler with temporal median filter), Scientific‑Atlanta '045, and Naimpally supply the motivation — the entire commercial and technical momentum of the IDTV era was toward increasing apparent vertical resolution, and the '780's own background acknowledges it as the recognized field of endeavor.

Combination D — RCA '850 / '978 / '675 + '3951 + Hitachi '985 + Philips '163.
These collectively establish that the progressive‑scan/line‑interpolation problem, its artifacts, and adaptive neighbor‑based solutions were thoroughly developed by 1988. They are best used to establish (i) the ordinary skill level, (ii) the absence of any non‑obviousness presumption from the field's maturity, and (iii) the backdrop against which the '780's incremental step must be judged.

5. Claim‑specific conclusions, including the weak links

Likely obvious (strong): claims 1–10, 15–26, 28–36, 39–41. The mapping in §3 is close to one‑to‑one, and for claims 5, 7, 9, 10, 26, 34, 35, and 41 the reference is cited in the '780 itself as the source of the exact claimed structure. Claim 31 and 39 ("computer character display") are met almost literally by '922, whose entire disclosure is character smoothing on a display apparatus, and by '264.

Likely obvious (moderate): claims 11–14, 27, 37, 38.

• Claims 11–13 require the fill signal to reach the scan circuitry and the beam to be deflected. '090's beam wobble is squarely on point, but '090 does not derive the wobble from image content, so a combination with '070 or '163 is required. That combination is well motivated (the '780's own admitted "geometric scan correction" art plus its express incorporation of '070).
• Claim 27 ("increasing the brightness of the beam creating such central element") is the weakest limitation in the patent. No cited reference squarely recites raising beam current because the spot has been enlarged. The best support is (i) '264‑family stroke‑width/exposure control, where the laser power reference is monitored and the quantum of enhancement is adjusted, i.e., adjusting delivered energy in tandem with an altered pel size; (ii) '090/'157‑family "increasing the amplitude of the additional signal at the receiving station"; and (iii) the pure engineering‑obviousness argument from the '780's own recognition that spreading a fixed electron flux over a larger area reduces photons per unit area and must be compensated. I would expect a trier of fact to find claim 27 obvious on the third ground, but this is where a patentee would most credibly draw a line.
• Claims 37 and 38 are broad alternative forms of claim 36 and add little.

Where the "no increase in the number of image elements" negative limitation bites. Claims 1, 8, 11, 15, 19, and 20 each close with "without requiring an increase in the number of image elements originally making up the image." A patentee will argue that '922's added 1/3‑width dots are added elements, and that '264's added black/gray pels are too. That argument has real force against Combinations B and against '922 alone, but it is irrelevant to combinations that rest on '090/'803: a wobbled beam adds no elements whatsoever — it merely relocates and spreads the display of elements that already exist. Combining '070's neighborhood comparison with '090's beam wobble therefore satisfies the negative limitation without strain, which is why Combination A should be the primary theory rather than a '922‑only theory.

6. Rebuttal‑proofing: what the patentee will argue

Secondary considerations. I found nothing in the record indicating unexpected results, copying, industry praise, or a long‑felt but unsolved need with a nexus to the claims. On the contrary, the '780's own background treats the goal as an active, well‑populated field of endeavor (Siemens 1988 up‑scan conversion; Naimpally 1988; IDTV/ATV/HDTV generally) — which normally weakens the non‑obviousness case.

7. Cross‑reference: contradictions and discrepancies to flag

Pursuant to the instruction to cross‑reference the previously generated sections, I note the following. None is a contradiction of substance in the prior sections' legal conclusions; all are textual/evidentiary discrepancies.

1. Litigation roll‑call discrepancy between the two prior sections. The "Patent summary" lists, among others, "IP Innovation LLC v. Sony Electronics, 1:04‑cv‑06388 (N.D. Ill.)", and asserts litigation included "N.D. Cal. 3:98‑cv‑01129; E.D. Tex. 2:03‑cv‑00013; S.D. Ill. 1:03‑cv‑02428." The authoritative litigation list on the patent record contains seven cases (1:02‑cv‑06231; 1:02‑cv‑07611; 1:03‑cv‑02428; 2:03‑cv‑00013; 1:05‑cv‑05620; 1:08‑cv‑00393; 3:98‑cv‑01129) and does not include 1:04‑cv‑06388. The later "Litigation Report" table of seven cases also omits 1:04‑cv‑06388. So the two prior sections are inconsistent with each other on this point, and the earlier section's Sony case caption is unverified against the patent record. I flag it rather than resolve it.

2. The '780's own Brief Description of the Drawings is offset by one figure relative to its Detailed Description, from FIG. 3 onward. The Brief Description states "FIG. 5 shows a detailed diagram of a given scan line," "FIG. 6 shows a group of nine neighboring image elements," and "FIG. 7 shows a block diagram of the present invention including the use of a ranking means." The Detailed Description instead describes FIG. 5 as the raster image 10b, FIG. 6 as scan lines 19/20, FIG. 7 as the nine‑pixel group with the logic table, and FIG. 8 as the block diagram containing rank logic means 27 and fill logic means 28. The claim‑relevant content (the nine‑pixel neighborhood, the ranking block) therefore sits in FIGS. 7 and 8 per the operative description, not FIGS. 6 and 7 as the Brief Description states. This matters both for § 112 support of claims 5, 10 and 41 and for construction.

3. Related internal inconsistencies in the description: the FIG. 4 passage says the expanded portion "shows four scan lines 12a, 13a and 15a" (three numbers given for four lines), and the FIG. 5 passage refers to lines "12b, 13b, 14b, and 15b corresponding to 12a, 13a, 14a, and 15a," introducing line 14a that the FIG. 4 discussion never introduced. Minor, but relevant to how much weight the specification's figure descriptions can bear in a claim‑construction or written‑description dispute.

4. Title spelling. The granted document's title as it appears on the record is "Apparatus and method for spacial scan modulation of a video display," while the priority‑application listing on the same record reads "Apparatus and method for special scan modulation of a video display." Per operating rules, both are reported literally and neither is auto‑corrected.

No contradiction was found with the prior sections' bibliographic data (patent number, inventor, application number, dates, claim count, expiration 2019‑07‑23), nor with the New Medium Technologies v. Barco inequitable‑conduct holding or the C1 reexamination certificate date.

8. Bottom line

The '780's claims would very likely have been held obvious under § 103 had the cited references been combined as K.S.R. requires.

• Primary theory: US 4,573,070 (Cooper) + US 4,544,922 (Sony) + US 4,363,090 (Licentia), optionally + US 4,521,803 (GE) — a neighborhood‑comparison and ranking engine, a known void‑filling/edge‑smoothing logic that adds or trims fractional elements, and a known CRT beam‑wobble technique for placing elements into inter‑line voids, all in the same field addressing the same problem.
• Single most damaging fact for the patentee: the '780's own specification names '070 by number and figure as the source of both the neighboring‑pixel means and the rank logic means, and concedes that small‑amount electron‑beam deflection was already practiced. Those are admissions plus an express suggestion in one document.
• Strongest claims: 5, 7, 9, 10, 16, 22, 24, 25, 26, 31, 41 — these read on the cited art with little or no gap.
• Weakest claim: 27 (beam‑brightness increase), with claims 11–14 and 40 requiring a two‑ or three‑reference combination.
• Practical relevance: the patent expired 2019‑07‑23 and, per the prior section, was held unenforceable for inequitable conduct in the Barco litigation. Any § 103 analysis now is therefore of historical and defensive value rather than a live invalidity posture, and the same reasons make the earlier "no 2026 CAFC activity" negative finding unremarkable.

Limitations on this analysis: I did not have full column/line text for US 4,389,668, 4,533,951, 4,620,217, 4,625,222, 4,661,850, 4,673,978, 4,684,985, 4,698,675, 4,853,970, 4,941,045, or 4,989,090 — for those I relied on their titles, assignees and dates as recorded on the patent page, and I have not asserted specific disclosures beyond what the titles and the '780's own discussion support. US 4,681,424 and EP 0 163 841 were used only to corroborate what US 4,544,264 discloses; they are not themselves references on the '780's cited list and are not advanced as § 103 art. Column/line pinpoint citations should be obtained from the full texts before any of this is reduced to a formal invalidity contention.