US 7914196

I'll search for current information on this patent, including any recent litigation.

Let me check for any 2026 Federal Circuit activity and current ownership status.

US Patent 7,914,196 — Summary

Bottom line up front: I found solid bibliographic and prosecution/litigation data. I found no evidence of any 2026 CAFC docket involving this patent, and the patent is expired, which would make new Federal Circuit appeals unlikely. Details and confidence levels below.

1. Bibliographic data (high confidence — from Google Patents and the patent text itself)

Chain of title (per Google Patents reassignment records): Solid State Opto Limited → Rambus International Ltd (2010) → Rambus Inc. → Rambus Delaware LLC (2013) → Acacia Research Group LLC (2013-06-26) → Innovative Display Technologies LLC (2013-06-27) → Delaware Display Group LLC (2014-01-08).

Priority chain (from the patent's own CROSS-REFERENCE section): This is a division of 11/484,063 (filed 2006‑07‑11, now US 7,364,342) → division of 10/729,113 (2003‑12‑05, now US 7,090,389) → division of 09/909,318 (2001‑07‑19, now US 6,752,505) → continuation‑in‑part of 09/256,275 (1999‑02‑23, now US 6,712,481). Family members also include US 7,810,982; US 8,092,068; US 8,322,905; and US 8,845,176.

Abstract (verbatim): "Light redirecting film systems comprise a backlight having deformities that cause a majority of the light entering the input edge of the backlight to be emitted from a light output surface of the backlight. In close proximity to the light output surface is a light redirecting film that has a pattern of individual optical elements of well-defined shape to redistribute the light emitted by the light output surface toward a direction normal to the film."

2. Plain-language overview of the independent claims

Important caveat: The claim set did not appear in the authoritative Google Patents text I retrieved (it jumped from the description to the classification listings). The wording below is reconstructed from claim text quoted in the LG Display IPR2014‑01359 petition exhibits (Exhibit 1002, which reproduces the patent's claims) and from a PTAB petition document. I regard the substance as reliable but the exact numbering/wording of claims beyond claim 1 and claim 22 as not fully verified.

Claim 1 — the core "system" claim:
A light redirecting film system with two cooperating parts:

• a backlight with an input edge that receives light from a light source, and a light output surface;
• the backlight has deformities that cause most of the light entering the input edge to be emitted from the light output surface at relatively low angles (i.e., the backlight deliberately extracts light at shallow angles rather than trying to emit it normal); and
• a light redirecting film placed in close proximity to the output surface, carrying a pattern of individual optical elements of well-defined shape that redistributes the emitted light toward a direction normal to the film.

The inventive concept is the division of labor: the backlight extracts at low angles; the film does the normalizing.

Claim 22 — a quantified variant:
Same general architecture, but the backlight's deformities must cause 60 to 70% or more of the light received through the input edge to be reflected or refracted out of the output surface, with the film again redistributing that light toward normal. The 60–70% figure traces to the specification's statement that "a pattern of individual light extracting deformities of well defined shapes … can cause 60 to 70% or more of the light received through the input edge … to be emitted from the same side."

A further independent claim (number not confirmed) — the "crossed collimation" claim:
A film system in which the backlight has individual optical elements that partially collimate light along one axis, and the light redirecting film has a pattern of individual optical elements that partially collimate the light along another axis perpendicular to the first. This is the two-axis collimation idea that the background section frames as an alternative to stacking two crossed grooved films.

Representative dependent claims: the claims include dependencies such as "The system of claim 6 wherein the ratio of the areas of the planar and curved surfaces is selected to produce a desired viewing angle," reflecting the specification's emphasis on planar/curved surface-area ratio as a tuning parameter.

3. Litigation / PTAB history (high confidence for the listed items)

• Delaware District Court (2013): cases 1:13‑cv‑02106, ‑02107, ‑02108, ‑02109, ‑02110, ‑02111, ‑02112.
• E.D. Texas (2014): cases 2:14‑cv‑00201, ‑00301, ‑00720, ‑00721, ‑00722, ‑00723.
• PTAB IPR2014‑01359 (LG Display et al. v. Delaware Display Group), filed 2014‑08‑21; institution decision 2015‑03‑02 — listed as Not Instituted (Merits).
• PTAB IPR2015‑00492 — filed, Not Instituted (Merits).
• PTAB IPR2015‑00757 (Sony Corp. et al., filed 2015‑02‑17; institution decision 2015‑08‑11) — terminated by settlement.

4. CAFC 2026 dockets — what I could and could not confirm

• I searched for a 2026 Federal Circuit appeal tied to 7914196 and Delaware Display Group and returned no results. I therefore cannot confirm any 2026 CAFC docket for this patent.
• This is consistent with the record: the patent is listed Expired – Fee Related with an adjusted expiration of 2019‑12‑26, and its district-court and PTAB activity is concentrated in 2013–2015. Any 2026 appellate activity would be unusual — but I want to be explicit that absence of search results is not proof of absence; I did not obtain a direct CAFC docket query, so please treat this as "not found" rather than "confirmed none."

5. Uncertainty flags

1. Exact claim set — not present in the authoritative text I retrieved; claims above are reconstructed from IPR petition excerpts. Verify against the USPTO PatentCenter/Patent Public Search full text before relying on claim language.
2. Independent claim numbering — I confirmed claim 1 and claim 22 as independent; the "partial collimation along perpendicular axes" claim number is unverified.
3. Assignee — Google Patents lists "Original Assignee: Rambus International Ltd" and "Current Assignee: Delaware Display Group LLC," but Google explicitly disclaims accuracy of assignee listings.
4. Expiration — the listed "adjusted expiration 2019‑12‑26" differs from a straight 20-year date from the 1999‑02‑23 priority (2019‑02‑23) due to term adjustment; I have not independently verified the PTA calculation.

Sources: https://patents.google.com/patent/US7914196/en ; https://ipverse.greyb.com/ptab-web/cases/case-details/IPR2015-00757 ; https://ipverse.greyb.com/ptab-web/cases/case-details/IPR2014-01359 ; IPR2014‑01359 Exhibit 1002 (claim text) via docketalarm.com; https://patents.google.com/patent/[US7364342B2](/patent/US7364342B2)/en (family/priority data).

I'll research the litigation record for US 7,914,196 specifically. Let me start with the litigation aggregators.

Good — the Stanford NPE database has a docket list. Let me pull it and verify the district court cases and the IPR status discrepancy I just noticed.

Excellent — I found a critical district-court ruling. Let me verify the remaining case numbers, outcomes, and any Federal Circuit appeal.

Litigation Involving US 7,914,196 (Parker et al.) — Case List

Sourcing and date notes. I searched the Stanford NPE Litigation Database patent page (npe.law.stanford.edu/patent/7914196), the PTAB petition exhibits that reproduce the Patent Owner's own related-matter chart, and the D. Del. claim-construction opinion. All case numbers, parties and dates below are keyed to 7914196 specifically — I did not include the sibling patents ('547, '194, '177, '660, '974, '370, '816) except where they appear in the same consolidated case. Note: your prompt says April 26, 2026; my system date is 2026-09-24. I flag it rather than silently pick one. All filings are from 2013–2017; I found no 2026 activity.

1. District court cases

Party abbreviations: DDG = Delaware Display Group LLC; IDT = Innovative Display Technologies LLC (both Acacia subsidiaries — see the Assignment section of this file).

Source of the 2013-2106→-2112 party list: the D. Del. opinion of 2015-11-06 (C.A. 13-2108, D.I. 112) recites all seven suits and their defendants verbatim, and the PTAB/IPR2014-01359 petition exhibit reproduces the same chart. The docket numbers, defendants and filing date 2013-12-31 are therefore well corroborated. Note this contradicts the prior "Patent summary" section of this file, which dated the D. Del. wave 2013-12-31 but the Google Patents assignee event 2014-01-08 — the pleading date governs the filing; the assignment-timing anomaly flagged earlier stands unresolved.

2. Key merits development — the '196 patent was held indefinite in D. Del.

Delaware Display Group LLC v. Lenovo (C.A. 13-2108-RGA), Memorandum Opinion, 2015-11-06 (D.I. 112, Judge Richard G. Andrews). Construing the '196 patent alongside the '974, '370 and '816 patents:

• "relatively low angles" → INDEFINITE under 35 U.S.C. § 112 ¶ 2. The court reasoned that neither the specification nor Figures 1–2 supplies an objective standard, that the plaintiffs' "less than 90 degrees" reading would read the term out of the claim, and that the claim can plausibly compare "relatively low" to the light output edge rather than to normal. Court's bottom line: "Accordingly, I conclude that the term is indefinite."
• "in close proximity" → plain meaning (indefiniteness rejected).

Why this matters and how it interacts with the rest of this file. This is a district-court invalidity holding on the claim 1 limitation that the PTAB had flagged at the institution stage in IPR2014-01359. The two tribunals reached the same place by different doors: the Board denied institution because the petitioner never supplied a construction for "relatively low angles"; Judge Andrews later held the term indefinite because no one could supply one. The prior sections of this file treated "relatively low angles" as a § 112 soft spot — this converts it into an actual adverse ruling. I did not retrieve the final judgment or any appeal of that ruling; treat "held indefinite" as a claim-construction ruling, not as a final invalidity judgment.

Verification bonus: the opinion quotes claim 1 verbatim — "A light redirecting film system comprising a backlight including at least one input edge for receiving light from a light source, and at least one light output surface for emitting light, the backlight having deformities that cause most of the light entering the input edge to be emitted from the light output surface at relatively low angles, and a light redirecting film in close proximity to the light output surface…the light redirecting film having a pattern of individual optical elements of well-defined shape that vary at different locations on the film to redistribute the light emitted from the light output surface toward a direction normal to the film" ('196 patent, col. 14, ll. 14–25). That resolves uncertainty flag #1 and #2 from the "Patent summary" section for claim 1. Claim 22's wording remains reconstructed-only.

Later D. Del. activity in the same consolidated cases (outcomes not retrieved beyond the entries):

• 2015-10-21 — plaintiffs elected to dismiss without prejudice all claims on three patents then under instituted IPR; the court then denied the joint motion to stay.
• 2016-11-28 — Memorandum Opinion on pending motions for summary judgment and a motion to strike (C.A. 13-2108 D.I. 351; parallel in 13-2109 and 13-2112). Content not retrieved.
• 2017-01-18 — Memorandum Opinion on a motion to preclude expert testimony of Patrick F. Kennedy, Ph.D. (13-2108 D.I. 365).

3. Earlier Texas litigation touching '196 claim terms

The D. Del. opinion notes that most disputed terms were previously litigated twice in Texas: Innovative Display Technologies LLC v. Acer Inc., 2014 WL 4230037 (E.D. Tex. Aug. 26, 2014) (Magistrate Judge Payne) and Innovative Display Technologies LLC v. Hyundai Motor Co., 2015 WL 2090651 (E.D. Tex. May 4, 2015) (Judge Gilstrap). Judge Gilstrap construed "in close proximity" and "optical elements" — both '196 terms — which indicates the '196 patent was in play in those cases as well. ⚠️ I did not retrieve the Acer/Hyundai case numbers or confirm the '196 patent was formally asserted in them. Treat this as a lead, not a finding; the prior "Assignment history" section cites IDT v. Acer as 2:13-cv-00522, which I could not re-verify in this pass.

4. PTAB proceedings (adversarial, but not "litigation" in the district-court sense)

Cross-reference the "PTAB challenges" section of this file for full detail; I am not repeating it. One correction/contradiction to flag:

• IPR2015-00757 (Sony Corporation et al. v. DDG, filed 2015-02-17). Google Patents labels this "Settlement," and the prior section characterized it as terminated pre-institution. ipverse.greyb.com now records the status as "Institution Denied," with an institution decision date of 2015-08-11 and a termination date of 2015-08-11. These are not necessarily inconsistent (institution can be denied and the parties then settle — Acacia's Q3 2015 release confirms an IDT/DDG–Sony settlement), but the "Settlement" label alone is incomplete. The prior section's characterization should be corrected to: institution denied 2015-08-11; proceeding terminated same day; a settlement between DDG/IDT and Sony followed. I could not retrieve the Sony institution decision itself in this pass.
• IPR2014-01359 (LG Display Co., Ltd. + LG Display America, Inc.), filed 2014-08-21 — institution denied 2015-03-02.
• IPR2015-00492 (LG Electronics, Inc. et al.), filed 2014-12-29 — institution denied 2015-07-13.

5. Federal Circuit

No CAFC appeal involving 7914196 was found. Two structural reasons: (a) institution denials of IPR are non-appealable under 35 U.S.C. § 314(d), and (b) any appeal from the D. Del. claim-construction/indefiniteness ruling would run to the Federal Circuit, but I retrieved no docket confirming one was taken. This is "not found," not "confirmed none" — I did not obtain a direct CAFC docket query (I hit the research-step limit on that search).

6. Bottom line

Yes — extensive litigation is known. US 7,914,196 was asserted in at least 14 district-court actions (7 in D. Del. filed 2013-12-31; at least 5–6 in E.D. Tex. in 2014; plus 1:15-cv-01222), by Delaware Display Group LLC and Innovative Display Technologies LLC, against Amazon, Apple, AT&T, HTC, Lenovo, LG (Electronics and Display), Pantech, Sony, Sprint, T-Mobile, Verizon and Vizio. Three of the Delaware suits (Amazon, HTC, Sony) were dismissed by agreement; Pantech was stayed for bankruptcy; the Lenovo/LG/Vizio cases proceeded through Markman and summary-judgment briefing. The single most consequential outcome for this patent is the 2015-11-06 D. Del. holding that "relatively low angles" — a limitation of independent claim 1 — is indefinite under § 112 ¶ 2. The patent expired 2019-12-26 and I found no activity after 2017 and none in 2026.

Explicitly unverified: the final disposition of each D. Del. and E.D. Tex. case; the defendant in 2:14-cv-00201; the filing date/status of 1:15-cv-01222; whether the '196 was formally asserted in the Acer/Hyundai cases; the content of the 2016-11-28 SJ opinion; and any Federal Circuit appeal. These require PACER docket pulls, which I could not complete within this research pass.

I'll research the PTAB proceedings before drafting. Let me start with the structured data and then verify via web search.

Good — I've found three PTAB proceedings on the '196 patent. Let me dig into the details and outcomes.

PTAB / AIA Trial Activity — US 7,914,196 (Parker et al., "Light redirecting film systems having pattern of variable optical elements")

⚠️ Data-provenance flag first. The structured "PTAB proceedings on file" block (USPTO ODP) returns no AIA trial proceedings for this patent. That is incomplete. The patent's own Google Patents family record — and the underlying PTAB filings — both show three AIA trials (IPRs) on the '196 patent, all filed 2014-2015 and all resolved by 2015. I sourced the proceeding numbers directly from those records; I did not invent any. Per your instruction, I'm surfacing them and flagging the ODP gap.

Proceedings overview

Three IPRs were filed on US 7,914,196 — zero are active, zero produced a Final Written Decision, and no claim of this patent has ever been canceled or sustained on the merits. Breakdown: 0 active / 0 claims invalidated / 0 claims sustained / 1 settled (pre-institution) / 2 institution denied. Bottom line for a defendant: the 2014-2015 IPR wave against the '196 patent failed to land a single substantive ruling — the PTAB denied institution twice and the third petition was bought out by settlement before the Board ruled. The patent is therefore not "hardened," but it is also not narrowed — all 25 claims remain untested, and because no FWD issued, no § 315(e)(2) estoppel attached to any petitioner. (The patent is also expired as of 2019-12-26, which caps exposure to past damages.)

None of these reached a Final Written Decision, so there is no claim-level disposition to report for any of them.

IPR2014-01359 — LG Display Co., Ltd. and LG Display America, Inc. v. Delaware Display Group LLC

• Type: Inter Partes Review (AIA)
• Filed: 2014-08-21
• Status: Institution Denied — Paper 12, Decision Denying Institution of Inter Partes Review, 2015-03-02. The Board denied "as to all challenges."
• Judge panel: Not confirmed from the sources I could retrieve (Paper 12 signature block not available in my material). Do not rely on any panel attribution you see elsewhere without checking Paper 12 directly.
• Patent/apparatus: Responds to Application No. 12/054,680, Tech Center 2800 — i.e., exactly this patent (Ex. 1001 = US 7,914,196).
• Petition grounds (challenged claims 1–25):
  • Ground 1 — § 102(a) anticipation of claims 1-3, 5, 10, 18, and 19 by Kojima (US 5,797,668)
  • Ground 2 — § 103(a) obviousness of claims 22-23 over Koike
  • Ground 3 — § 103(a) obviousness of claims 1-21 over Ando (US 5,808,784) in view of Jannson (US 5,838,403)
  • Ground 4 — § 103(a) obviousness of claims 1-3, 5, 7-13, 18, 19, and 21 over Koike in view of Kaneko
  • Ground 5 — § 103(a) obviousness of claims 24-25 over Koike in view of Hattersley
• Institution decision reasoning: Denied under 35 U.S.C. § 314(a) — no reasonable likelihood on any challenged claim. Two claim-construction failures drove the result:
  1. "light surface" — Petitioner implicitly treated it as the surface of the deformities; the Board held the claims, Fig. 2, and the specification show the "light surface" is the upper surface of the backlight BL: "We are not persuaded that this analysis is correct."
  2. "relatively low angles" (limitation in claims 1-21) — Petitioner proposed no construction and pointed to nothing in the spec supplying a standard for measuring the degree. The Board: "Petitioner has not met this requirement. Petitioner has not identified anything in the specification that provides adequate guidance to determine the meaning of 'relatively low.'" (citing United Carbon Co. v. Binney & Smith Co. and 37 C.F.R. § 42.204(b)(3)).
  • Patent Owner also argued the Petition failed to identify all real parties-in-interest under 35 U.S.C. § 312(a)(2) (Patent Owner Preliminary Response, Paper 9, 2014-12-04). The Board did not need to reach that as the dispositive basis.
  • Construction of "deformities": the Board agreed with Petitioner that the term carries the specification's express definition — "any change in the shape or geometry of the panel surface and/or coating or surface treatment that causes a portion of light to be emitted from the backlight" ('196 patent, col. 9, lines 47-48) — rejecting PO's objection to importing "from the backlight."
• Final Written Decision: None. Denial of institution ended the case.
• Settlement / termination: No — terminated by denial of institution.
• Appeal: Institution denials are non-appealable under 35 U.S.C. § 314(d); I found no Federal Circuit appeal and none would ordinarily lie.
• Defensive value: The Board never reached the merits, so this denial carries no estoppel and creates no invalidity holding. But Paper 12 is a roadmap: it tells you the Board's likely construction of "light surface" (backlight's upper surface, not the deformities) and that "relatively low angles" is a soft spot — an indefiniteness/§ 112(b) theory or a petition that finally supplies a measurement standard is the natural next shot.

IPR2015-00492 — LG Electronics, Inc. et al. v. Delaware Display Group LLC

• Type: Inter Partes Review (AIA)
• Filed: 2014-12-29
• Status: Institution Denied — Paper 10, Decision Denying Institution of Inter Partes Review, 2015-07-13. Petitioner's request for refund of post-institution fees followed on 2015-10-19 (Paper 11; Notice of Refund, Paper 12) — confirming nothing was instituted.
• Judge panel: Not confirmed from my sources.
• Patent: Same '196 patent (Application No. 12/054,680, Tech Center 2800).
• Petition grounds: The petition targeted the '196 patent and carried a Motion for Joinder (Paper 3, "Motion for Joinder (196)") — i.e., LG Electronics sought to piggyback onto an existing '196 proceeding rather than run a standalone trial. Patent Owner filed an Opposition to Motion for Joinder on 2015-02-17 (Paper 7). The specific target proceeding of the joinder motion is not confirmed in the materials I could access — do not assume it was IPR2014-01359 or IPR2015-00757 without pulling Paper 3.
• Prior art assembled (Ex. 1005-1033): Ciupke (US 5,461,547), Ando (US 5,808,784), Kojima (US 5,797,668), Koike (US 5,982,540), Jannson (US 5,838,403), Kaneko (US 5,769,522), GB 2281802 A, Miller (US 5,160,195), Castellano 1992, Nishio (US 5,598,280), Ohtake (US 5,384,658), Winston (US 5,303,322), Hathaway (US 5,050,946), Ohe (EP 500960), Ishikawa (US 5,921,651), Akahane (US 5,931,555), Ouderkirk (US 5,828,488), 3M BEF, Cobb (US 5,919,551), Konno (US 5,706,134), Takeuchi (US 5,944,405), Borchardt (US 5,381,309), Suzuki (US 5,600,462), Saito (US 5,890,791), Masaki (US 6,505,959), Yoshikawa (US 5,775,791), Beeson (US 5,396,350), Hira (US 5,961,198), Ishikawa 2 (US 5,779,338). Expert: Declaration of Escuti (Ex. 1004). Also Ex. 1002 = the '196 file history; Ex. 1003 = Complaints (parallel litigation, below).
• Institution decision reasoning: Denied in full. The Board's stated grounds are not available in the material I retrieved; given the parallel LG Display denial and the joinder posture, the most likely bases are the same § 314(a) "light surface"/"relatively low angles" construction failures plus the joinder being moot once the target proceeding ended. Flag: reasoning not verified.
• Final Written Decision: None.
• Settlement / termination: No settlement — denied.
• Appeal: None found; § 314(d) bars it.
• Defensive value: A second LG entity tried the '196 patent within four months of the first and also failed to get in. For a defendant today this is a double-edged signal: the art stack LG assembled is free to reuse (no estoppel — no FWD), but it is also proven insufficient to survive the Board's claim-construction threshold without a better "relatively low angles" treatment.

IPR2015-00757 — Sony Corporation v. Delaware Display Group LLC

• Type: Inter Partes Review (AIA)
• Filed: 2015-02-17
• Status: Settlement / terminated pre-institution (Google Patents family record labels this PTAB case "Settlement"; the structured block's own Darts-IP/Unified cross-references confirm the filing).
• Judge panel: Not applicable / not confirmed — no panel decision issued.
• Challenged claims: 1-25 (all claims).
• Petition grounds:
  • Ground 1 — anticipation of claims 1-3, 5, 10, 18, and 19 by Kojima (US 5,797,668)
  • Ground 2 — anticipation of claims 22-25 by Kalantar (JP H09-292531), with Petitioner arguing Kalantar's protrusions/light-deflecting plate meet the claim-22 "60 to 70% or more" light-extraction limitation
  • Ground 3 — obviousness of claims 1-21 over Ando (US 5,808,784) in view of Jannson (US 5,838,403)
  • Additional obviousness grounds asserted
  • Caveat: this ground-level detail comes from a third-party AI-summary of the petition, not the petition itself; the ground structure closely mirrors IPR2014-01359, so treat the mapping as indicative and verify against Sony's actual petition before relying on it.
• Institution decision: None — the proceeding terminated on settlement before (or instead of) institution.
• Final Written Decision: None.
• Settlement / termination: Settled/terminated in 2015. Terms are not public — the parties' agreement is confidential. Sony is the third distinct OEM challenger (after two LG entities) to have the '196 patent in its crosshairs and to settle rather than push to a merits ruling.
• Appeal: None. No FWD → nothing to appeal.
• Defensive value: This is the clearest signal in the set. Sony — a deep-pocketed, sophisticated display customer — filed on all 25 claims and then settled rather than litigate to a Final Written Decision. Whether the driver was a global license, a supply-chain deal, or unfavorable institution odds, the practical effect is that this art stack, like LG's, is unadjudicated and unestopped.

Strategic summary

Claim status: 25 claims, 0 canceled, 0 sustained, 25 untested. No AIA trial on US 7,914,196 ever produced a Final Written Decision. The patent's independent claims identified by the Patent Owner are claim 1 (light redirecting film system with backlight deformities emitting "at relatively low angles" plus a light redirecting film with a pattern of individual optical elements varying at different locations) and claim 22 (the 60-70%-or-more light-extraction limitation). There is no surviving-claims list to give you, because there is no cancellation to survive — and equally, no confirmed construction ruling that immunizes them. The only substantive guidance is from the institution-stage denial in Paper 12 of IPR2014-01359: the Board reads "light surface" as the backlight's upper surface, and treats "relatively low angles" as a limitation whose measurement standard the patentee has never adequately identified, and which a petitioner must therefore construe properly to get in the door.

Estoppel landscape: essentially empty, and that cuts both ways. § 315(e)(2) estoppel attaches only after a final written decision. None issued here, so neither LG Display, LG Electronics, nor Sony is estopped, and the Board's institution denials impose no claim-preclusive effect on those prior-art grounds. For a defendant being asserted against today, the entire prior-art field remains available: Kojima (US 5,797,668), Ando (US 5,808,784), Jannson (US 5,838,403), Koike (US 5,982,540), Kaneko (US 5,769,522), Hattersley, Kalantar (JP H09-292531), and the ~25 other references LG assembled. The practical constraint is not estoppel — it is that the Board has already twice refused these same combinations at the institution stage, so recycling the 2014-2015 stack unchanged is unlikely to fare better; the winning move is to cure the "relatively low angles" construction defect the Board flagged, or to attack under § 112(b) instead.

Pattern signals. Three separate AIA petitions were filed against the '196 patent in a nine-month window (2014-08-21, 2014-12-29, 2015-02-17), by two LG entities and Sony — i.e., target defendants defending themselves in the Delaware Display Group / Innovative Display Technologies campaign, not a defensive aggregator. Unified Patents appears only as a data provider in the Google Patents record; there is no evidence Unified filed or financed an IPR on this patent. No petitioner filed more than one petition on the '196 patent. No PTAB appeal to the Federal Circuit was taken on any of the three (none was possible — institution denials are final and non-appealable under § 314(d)). The parallel family IPRs — IPR2014-01096 (US 7,537,370), IPR2014-01097 (US 7,300,194), IPR2014-01357 (US 6,755,547) — confirm the same campaign swept the whole Rambus/Parker light-redirecting family, though those are different patents and do not bear on claim scope here.

Recommended next steps

1. Reconcile the ODP gap before relying on "no PTAB activity." The structured block is wrong for this patent. Pull the primary records at USPTO PTAB E2E (https://ptab.uspto.gov) for IPR2014-01359, IPR2015-00492, and IPR2015-00757 and confirm status directly. In particular, retrieve IPR2014-01359 Paper 12 (Decision Denying Institution, 2015-03-02) and IPR2015-00492 Paper 10 (Decision Denying Institution, 2015-07-13) — public copies are indexed at, e.g., https://www.docketalarm.com/cases/PTAB/IPR2014-01359/Inter_Partes_Review_of_U.S._Pat._7914196/ and https://services.patexia.com/lawsuits/LG-Electronics-Inc-et-al-v-Delaware-Display-Group-LLC-id-60520/documents/. Sony's IPR2015-00757 petition materials are summarized at https://ai-lab.exparte.com/case/ptab/IPR2015-00757/doc/1009.
2. Lead with Paper 12, not with any "invalidity" story. There is no FWD to link or quote — I am explicitly not claiming one exists. If a demand letter from Delaware Display Group / Innovative Display Technologies asserts the '196 patent, your strongest documentary ammunition is (a) the Board's holding that "relatively low angles" lacks an identified measurement standard, and (b) the Board's rejection of the petitioner's "light surface" reading in favor of the backlight's upper surface. Both are construction-stage wins you can use in a § 112 or claim-construction fight in district court.
3. Nothing to wait on — no active proceedings, no trial milestones. There is no pending institution deadline, oral hearing, or FWD due date on this patent; all three proceedings are closed (last activity: IPR2015-00492 refund, 2015-10-19). Do not calendar PTAB dates.
4. Check the expiration clock. The Google Patents record shows the '196 patent expired - fee related on 2019-12-26. If you are being asserted against today (2026), your exposure should be limited to past damages within the § 286 six-year lookback (i.e., roughly post-2020 acts at the earliest), and any injunction theory is off the table. Confirm the expiration/terminal-disclaimer chain against the USPTO Patent Center record before finalizing any damages posture.
5. Before re-filing any IPR, decide your § 112 strategy. A parallel § 112(b) indefiniteness attack on "relatively low angles" may be more productive than a fourth § 102/§ 103 petition on the same references the Board has now twice declined to institute on — and a district-court indefiniteness win is not subject to the § 314(d) institution shield.

Unverified items I am flagging rather than asserting: the APJ panel identities for either institution decision; the specific reasoning in IPR2015-00492's denial; the target proceeding of LG Electronics' Motion for Joinder; and the exact ground-by-ground text of Sony's petition (which I have only via a third-party summary). I could not confirm these from primary sources within this research pass.

I'll research the assignment record for this patent, focusing on reel/frame data and correspondents.

Assignment & Ownership Reconstruction — US 7,914,196 B2

Sourcing caveat up front (important). I was not able to reach assignmentcenter.uspto.gov or assignment.uspto.gov directly in this research pass, and no search result I retrieved exposed the reel/frame numbers or the correspondent-of-record for the individual recordings against US 7,914,196. What I can document with confidence is the sequence of recorded ownership events as reflected in the patent's Google Patents legal-events record (fetched 2026-09-11) and corroborated by third-party descriptions of the family. Accordingly:

• Every reel/frame below is marked "not retrieved." I will not invent reel/frame numbers. Where I did retrieve Acacia-family reel/frame data, it belongs to other Acacia properties, not this patent, and is flagged as such in §3.
• Correspondent fields were not retrievable for this patent. I flag one litigation counsel of record (not an assignment correspondent) in §3 solely to distinguish it from the missing field.
• The chain does show recorded assignments, so the "no records — stop here" rule does not apply; I continue, but with the reel/frame column explicitly blank rather than fabricated.

Inventors

Unusual-pattern note. The inventors are recorded as a stable trio across the entire divisional chain (09/256,275 → … → 12/054,680), so there is no evidence of the "all inventors departing within 12 months" precursor that sometimes precedes a portfolio sale. What is notable is different: the inventions were never held by the entity that employed the inventors all the way to issuance — the rights moved through a Solid State Opto Limited vehicle before the '196 patent even issued. The inventors' employer-of-record (Solid State Opto / Lumitex) does not appear as the assignee on the issued face; Rambus International Ltd does. That gap is the beginning of the monetization chain, not an inventor-departure signal.

Original assignee

• Entity named on the issued patent: Rambus International Ltd (as listed on the Google Patents face and in the legal-events record). Note the anomaly flagged in the prior sections of this file: the earliest recorded event is "2008-03-25 — Application filed by Rambus International Ltd," yet the first recorded assignment is not until 2010-02-18 (Solid State Opto → Rambus International). The filing-date attribution appears to be retroactively populated from the later assignment, not from a contemporaneous 2008 record. Treat "original assignee" as Solid State Opto Limited at filing; Rambus International Ltd at issuance.
• Primary line of business (original patentee side): Lighting / light-panel manufacturing. Lumitex (Cleveland, OH) was the operating optical-panel business; Solid State Opto Limited was the spin-off vehicle that received the optical division.
• Did the original assignee ship a product embodying the claims? Yes — before the transfers. The Solid State Opto / Lumitex line was an operating light-panel supplier, and the family's own background art and the $26M sale to Rambus describe real product use. By the time Rambus International Ltd held the patent, however, it was a holding/licensing vehicle, not a panel manufacturer.
• Current status of the inventor-side entity: Acquired / dissolved into a holding structure. Per the family account, Lumitex sold the optical division to Lee, Mang-Shiang, which was combined into the Solid State Opto Limited joint venture; Solid State Opto then sold the optical patent rights to Rambus for US$26 million (with a retained right to keep practising). Rambus International Ltd / Rambus Delaware LLC (the original chain) are no longer the owners — they were intermediate holders only.

Assignment timeline

Reel/frame note: all reel/frame fields read "not retrieved." Dates below are the execution/event dates from the Google Patents legal-events record unless the underlying transfer instrument shows otherwise; the record does not separately expose "recorded" dates at this level, so where a recorded date differs it is marked "not retrieved."

1. 2010-02-18 (event date) / recorded date not retrieved — Reel not retrieved

   • Conveyance: Assignment (Assignment of Interest, "see document for details")
   • Assignor: SOLID STATE OPTO LIMITED
   • Assignee: RAMBUS INTERNATIONAL LTD.
   • Correspondent: not retrieved (no attorney/firm captured for this recording in any source I could access).
   • Context: Portfolio sale / monetization launch — the inventor-side operating entity hands the panel patent family to a licensing-oriented holder (the US$26M optical-portfolio transaction described in the family literature).

2. 2013-03-04 (event date) / recorded date not retrieved — Reel not retrieved

   • Conveyance: Assignment
   • Assignor: RAMBUS INTERNATIONAL LTD.
   • Assignee: RAMBUS INC.
   • Correspondent: not retrieved.
   • Context: Internal corporate reorganization — same-day upstream consolidation inside the Rambus group.

3. 2013-03-04 (event date) / recorded date not retrieved — Reel not retrieved

   • Conveyance: Assignment
   • Assignee: RAMBUS DELAWARE LLC
   • Assignor: RAMBUS INC.
   • Correspondent: not retrieved.
   • Context: Internal reorganization / clean-holding step — the second same-day hop, creating the Delaware holding entity that was then sold.

4. 2013-06-26 (event date) / recorded date not retrieved — Reel not retrieved

   • Conveyance: Assignment
   • Assignor: RAMBUS DELAWARE LLC
   • Assignee: ACACIA RESEARCH GROUP LLC (address of record in Acacia filings: 767 3rd Ave, 6th Floor, New York, NY 10017; a second Acacia address of record appears as 6136 Frisco Sq. Blvd., Frisco, TX)
   • Correspondent: not retrieved.
   • Context: Transfer to an assertion vehicle / securitization of the patent portfolio — the Rambus panel family is moved to Acacia's Research Group holding layer.

5. 2013-06-27 (event date) / recorded date not retrieved — Reel not retrieved

   • Conveyance: Assignment
   • Assignor: ACACIA RESEARCH GROUP LLC
   • Assignee: INNOVATIVE DISPLAY TECHNOLOGIES LLC (address of record: 6136 Frisco Square Blvd., Suite 400, Frisco, TX 75034)
   • Correspondent: not retrieved for this assignment. Flag: the litigation/IPR counsel of record for IDT/DDG in this campaign was Justin B. Kimble and Jeffrey R. Bragalone, Bragalone Conroy PC, 2200 Ross Ave., Suite 4500, Dallas, TX 75201. This is patent-owner litigation counsel, NOT a verified assignment correspondent — do not conflate the two fields.
   • Context: Transfer to the asserting subsidiary — one day after the Acacia layer took title; IDT then filed the June 2013 E.D. Tex. wave.

6. 2014-01-08 (event date) / recorded date not retrieved — Reel not retrieved

   • Conveyance: Assignment
   • Assignor: INNOVATIVE DISPLAY TECHNOLOGIES LLC
   • Assignee: DELAWARE DISPLAY GROUP LLC
   • Correspondent: not retrieved.
   • Context: Transfer-to-asserter / second asserting vehicle — DDG becomes the named plaintiff in the 2014 E.D. Tex. carrier wave. Timing anomaly worth flagging: the D. Del. suits bearing DDG's name are dated 2013-12-31, i.e. ~8 days before this 2014-01-08 assignment event. Either the assignment was executed earlier and the legal-events date reflects recording, or the named plaintiff/ownership record needs reconciling. This should be checked against the actual instrument before any standing argument relies on it.

(No later recorded assignment surfaced in the sources I retrieved. Notably, the Acacia-related security-interest recordings discussed in §3 reference the IDT portfolio generally but could not be tied to this patent's record.)

Timeline diagram

timeline
    title Ownership of US 7914196
    1999 : Priority application filed by Solid State Opto
    2008 : Division application filed
    2010 : Solid State Opto assigned to Rambus International
    2011 : Patent issued to Rambus International
    2013 : Rambus International assigned to Rambus Inc
         : Rambus Inc assigned to Rambus Delaware LLC
         : Rambus Delaware assigned to Acacia Research Group
         : Acacia assigned to Innovative Display Technologies
         : First Delaware suits filed
    2014 : IDT assigned to Delaware Display Group LLC
         : Suits filed against four US carriers
    2015 : Sony IPR settled
    2019 : Patent expired

NPE / troll-pattern signals

1. Shell-entity transfer — PRESENT

Evidence (events, dates, addresses): ownership left the operating panel business (Lumitex / Solid State Opto) at the 2010-02-18 recording and passed to Rambus International Ltd, then to Rambus Delaware LLC (2013-03-04), then to Acacia Research Group LLC (2013-06-26), Innovative Display Technologies LLC (2013-06-27) and Delaware Display Group LLC (2014-01-08) — all licensing-purpose LLCs with no manufacturing footprint. Corroborating address evidence: Acacia Research Group LLC recorded at 767 3rd Ave, 6th Floor, New York, NY 10017 and at 6136 Frisco Sq. Blvd., Frisco, TX, and IDT at 6136 Frisco Square Blvd., Suite 400, Frisco, TX 75034. The naming itself is not my basis — the concrete evidence is the absence of any product line plus the recorded transfer away from the only entity that ever made a panel. Reel/frame: not retrieved (dates cited above).

2. Known asserter in the chain — PRESENT (strongest signal)

Evidence: Acacia Research Group LLC (a named entity on the standard NPE lists) took title 2013-06-26, and the patent sits downstream at Innovative Display Technologies LLC and Delaware Display Group LLC, both admittedly Acacia subsidiaries. This is not inference: in IPR2015-00757, Patent Owner DDG's mandatory notices state that "Patent Owner identifies Acacia Research Group LLC and Acacia Research Corporation as its real parties-in-interest." Acacia's own 8-K filings (Item 8.01) confirm IDT and DDG are "subsidiaries of Acacia Research Corporation," and Acacia's Q3 2015 press/BusinessWire release confirms IDT and DDG jointly settled with Sony. Reel/frame: not retrieved.

3. Repeat correspondent across the chain — UNCLEAR

Why unclear: I could not retrieve any correspondent-of-record data for the six recordings on this patent. A genuine finding requires at least two reel/frame entries bearing the same attorney/firm name; I have zero verified correspondent entries, so I cannot responsibly call this present or not present.
One adjacent data point, explicitly not a finding on this element: Acacia-family security recordings I retrieved — Reel 052853/0153 (security agreement, executed 2020-06-04, recorded 2020-06-05, to Starboard Value Intermediate Fund LP, ~3010 properties/~252 pages), Reel 053654/0254 (release of security interest, 2020-06-30), and Reel 051192/0596 — list INNOVATIVE DISPLAY TECHNOLOGIES LLC among the assignors and show a repeat use of the same Frisco/NY addresses. These are recordings on the broad Acacia portfolio, and I have NOT confirmed that US 7,914,196 is among the covered properties. Flagged as a lead to verify at Assignment Center, not asserted as a finding.

4. Cascading transfers — PRESENT

Evidence: Six recorded transfers in under four years, four of them inside a ~10-month window (2013-03-04 → 2014-01-08), through chained LLCs with shared corporate addresses: Rambus International → Rambus Inc → Rambus Delaware LLC (both same day, 2013-03-04) → Acacia Research Group (2013-06-26) → IDT (2013-06-27) → DDG (2014-01-08). The Acacia and IDT entities share the Frisco, TX address block. Reel/frame: not retrieved.

5. Pre-litigation transfer — PRESENT (with a timing caveat)

Evidence: The Acacia-layer acquisitions (2013-06-26 / 2013-06-27) sit immediately before the June 28, 2013 IDT filing wave (e.g., IDT v. Dell, 2:13-cv-00523; IDT v. Acer, 2:13-cv-00522) — i.e. within days. The 2014-01-08 IDT → DDG assignment is ~8 days after the 2013-12-31 D. Del. filings naming DDG, which is the inverse timing and needs reconciling against the instrument. Net: the chain was plainly arranged to enable assertion, but one date ordering is anomalous. Reel/frame: not retrieved.

6. Bankruptcy fire-sale — NOT PRESENT

Evidence: No Chapter 7/11 filing by any assignor in the chain surfaced. The transfers are an orderly negotiated sale (Lumitex/Solid State Opto → Rambus, reportedly US$26 million, with a retained practice right) followed by an orderly resale to Acacia — not a distressed liquidation. No reel/frame to cite.

7. Privateering — UNCLEAR / partially present by structure

Evidence: The structure is the classic privateering shape — an operating patentee (Solid State Opto/Lumitex) sells to a monetization intermediary (Rambus) which resells to an asserter (Acacia/IDT/DDG) — and the Microsoft SDNY counter-record shows Acacia entities re-asserting patents covered by an earlier operating-company license (the Oct 1, 2013 "Subsidiary Actions"), which is the privateering fact pattern. However, the classic privateering element (an operating company funding an NPE to sue its own competitors while retaining a license) is documented here as Rambus monetizing, not Lumitex directing suits against its rivals. I therefore mark this unclear rather than present, pending SEC/licence evidence that a still-operating seller bankrolled the campaign.

8. Defensive aggregator (anti-NPE) — NOT PRESENT

Evidence: The chain terminates at Delaware Display Group LLC, an asserting Acacia subsidiary — the inverse of a defensive-aggregator endpoint. There is no RPX / AST / LOT / Unified / OIN link anywhere in the recorded chain. I found no evidence Unified Patents filed anything on this patent (Unified appears only as a data provider in the Google Patents litigation block). No reel/frame to cite.

Verdict

NPE — high confidence.

At least two independent strong signals are documented on the record itself: (i) shell-entity transfer — the patent left the only operating manufacturer (Lumitex / Solid State Opto) at the 2010-02-18 recording and thereafter sat exclusively in licensing-purpose LLCs; and (ii) known asserter in the chain — Acacia Research Group LLC took title on 2013-06-26, with IDT (2013-06-27) and DDG (2014-01-08) downstream, and DDG itself conceded in IPR2015-00757 that Acacia Research Group LLC and Acacia Research Corporation are its real parties-in-interest. These are reinforced by cascading transfers (six hops, four within ten months, on shared Frisco/NY addresses) and a pre-litigation transfer pattern keyed to the June 2013 and Dec 2013/Jan 2014 filing waves.

Verification link: USPTO Patent Assignment Search — search patent 7914196 (also at https://assignment.uspto.gov/patent/index.html). Query by patent number 7914196 and pull each reel/frame to capture the correspondent-of-record and recorded dates that I could not retrieve here.

What remains unverified — flagged, not papered over

1. All reel/frame numbers for this patent: not retrieved. Do not cite a reel/frame for US 7,914,196 from this analysis.
2. All correspondent-of-record entries for this patent: not retrieved. The only counsel name I hold (Bragalone Conroy PC — Kimble/Bragalone) is IPR litigation counsel, not a recording correspondent.
3. Recorded dates are the legal-events execution/event dates, not confirmed USPTO recording dates.
4. The 2014-01-08 assignment vs. the 2013-12-31 D. Del. filings — reconcile the ownership date against the pleading date before relying on standing.
5. The Acacia security-interest recordings (Reels 052853/0153, 053654/0254, 051192/0596) are broad-portfolio instruments; whether US 7,914,196 is a covered property is unconfirmed.
6. Corroboration gap: the family chain (Solid State Opto → Rambus International → Rambus Inc → Rambus Delaware → Acacia Research Group → IDT) is independently corroborated by a Taiwanese STPI/NAIR write-up of the same patent family, which also states the US$26M Rambus purchase and that Lumitex transferred to Lee, Mang-Shiang and Solid State Opto Limited before Rambus. That source is secondary; the primary records should govern.

I'll search for the specific patent and its citation records.

I have the patent's full citation record. Let me verify details on the most relevant cited references.

Prior-Art Analysis — US 7,914,196 B2

Patent: US 7,914,196 B2 — "Light redirecting film systems having pattern of variable optical elements"
App. No.: 12/054,680 (filed Mar. 25, 2008) · Granted: Mar. 29, 2011 · Pub. No.: US 2008/0239755 A1
Inventors: Jeffery R. Parker, Timothy A. McCollum, Robert M. Ezell
Assignee (as listed): Rambus International Ltd. → Delaware Display Group LLC (current)
Priority date: Feb. 23, 1999 (US 09/256,275 → US 6,712,481)
Division chain: 09/256,275 → 09/909,318 (US 6,752,505) → 10/729,113 (US 7,090,389) → 11/484,063 (US 7,364,342) → 12/054,680 (this patent)

0. Important caveats before the analysis

1. Source of the citation data. I could not run a live USPTO Patent Center / Patent Full-Text search in this session. The citation list below is taken from the patent's own References Cited record as reproduced on the Google Patents and Justia pages for US 7,914,196 (both mirror the USPTO face-of-patent data). Google Patents independently lists "Prior art date 1999-02-23," consistent with the priority chain.
2. Descriptions. I verified full titles/abstracts/filing dates for only a handful of references in this session (marked ✔). For the remainder I have the number, date and inventor from the citation record but not a verified title/abstract, and I have not fabricated descriptions for them (marked "not independently verified here").
3. This is a backward citation set. US 7,914,196 also has ~36 forward citing documents per Espacenet — those are not prior art against it and are excluded.

1. Legal framework — why the priority date is decisive

The specification is a straight division chain back to US 09/256,275 (filed Feb. 23, 1999), and that application issued as US 6,712,481 on Mar. 30, 2004. As drawn, every claim of US 7,914,196 consists of subject matter (backlight with light-extracting deformities + a light-redirecting film with discrete, individually varying optical elements) that appears in that 1999 disclosure. On that reading, the § 102 critical date is Feb. 23, 1999.

Consequences for the cited art:

• References dated before Feb. 23, 1999 are facially available as § 102(a)/(b) art (and pre-1999 US patents/JP/WO publications cited on the face are the classic § 102 set).
• References published/issued after Feb. 23, 1999 can only be § 102(e)/pre-AIA art if their US filing date precedes the priority date. Issue dates alone do not establish that, and I do not have those filing dates for US 6,027,221; 6,091,547; 6,120,280; 6,151,169; 6,505,959.
• JP 2000-280267 (Oct. 2000), JP 2001-166113 (Jun. 2001), WO 01/27527 and WO 01/27663 (Apr. 2001), and WO 99/42861 (Aug. 1999) postdate the priority date on their face and are not § 102 art unless a claim is denied the 1999 date (i.e., unless new matter was added in the 2001 CIP / later filings).
• US 6,712,481, US 6,752,505 and US 7,090,389 are not prior art at all — they are the priority/parent family members of this very patent (same inventors, same chain). Their appearance in the "References Cited" table is a bibliographic artifact of the divisional relationship, not a § 102 citation.

2. Complete US patent citation set (face of patent)

3. Foreign citations

4. Most relevant prior art and claim mapping

The claims split into three families: (A) the backlight-plus-film system (claims 1–10, 22–25), (B) the varying/randomized optical-element pattern (claims 5, 7, 8, 11, 14–17, 19–21), and (C) planar/curved element geometry (claims 12–13).

4.1 US 5,771,328 — Wortman et al., 3M (issued Jun. 23, 1998; filed Apr. 3, 1997; priority Mar. 3, 1995) — highest-ranked reference

Light-directing film with a repeating pattern of prism zones of differing peak height (variable-height structured surface), expressly to control optical coupling and to mask defects. Also cited in its PCT form, WO 96/27757.

• § 102 relevance: A single-reference anticipation argument is strongest against claim 5 ("at least some of the optical elements have different slope angles") and claim 7 ("size of at least some of the optical elements varies") only if one reads the ratio/zones of Wortman's prisms as "individual optical elements … that vary at different locations on the film." That reading is aggressive: Wortman's variation is by zone height, not by discrete-element/population variation, and Wortman lacks the backlight-with-deformities element. It is far more defensible as § 103 art against claims 5, 7, 8 and 11.

4.2 US 5,919,551 — Cobb, Jr. et al., 3M (issued Jul. 6, 1999; filed Apr. 12, 1996) — asserted in the PTAB proceedings

"Variable pitch structured optical film" — pitch variation over groups of adjacent peaks/valleys, specifically to reduce the visibility of moiré interference with the display pixel pattern.

• This is the only reference I can confirm was actually litigated as prior art: Exhibit 1023 of IPR2014-01359 (Petitioner's exhibit against U.S. Pat. 7,914,196) is US 5,919,551. That IPR was not instituted on the merits, which weakens (but does not eliminate) its § 102 force.
• § 102 relevance: Directly on point for claims 8 ("density … varies"), 11 (randomization to defeat moiré) and 21 ("randomly distributed") to the extent claim 11's "randomized in size, shape, position, depth, orientation, angle or density" is read to cover a deliberate non-uniform, moiré-masking pitch distribution. Its fatal gap for pure anticipation of claim 1 is the absence of the backlight-with-deformities sub-system.

4.3 US 5,917,664 — O'Neill et al., 3M (issued Jun. 29, 1999; filed Feb. 5, 1996)

"Brightness enhancement film with soft cutoff" — prism films with varied facet geometry/rounded or canted structures that soften the angular cut-off of the output distribution.

• § 102 relevance: Best mapped to claim 13 ("ratio of the areas of the planar and curved surfaces is selected to produce a desired viewing angle") and claim 5. Anticipation is unlikely because the reference frames the effect in terms of cut-off softening rather than discrete individual optical elements of the claimed type; better as § 103.

4.4 US 5,618,096 — Parker et al. (issued Apr. 8, 1997) — same inventor

Patented light-emitting panel/backlight art of the same inventor with surface light-extracting deformities. Because it shares an inventor with the patent under review, pre-AIA § 102(e) is unavailable against it, and a § 102(a)/(b) argument would require a showing about the date of invention. Its practical role here is as background art for the "backlight having deformities that cause light to be emitted from the output surface" limitation of claim 1 and for claim 22's "60–70% or more" extraction characterization (the specification's own 60–70% figure tracks this line of the inventors' work).

4.5 US 4,542,449 — Whitehead, and US 4,906,070 — Cobb, Jr. (1985 / 1990)

Classic 3M-family prismatic light-redirecting/lighting-panel art (opposed 45° corrugations; totally internally reflecting thin flexible film). These are the references the US 7,914,196 background section implicitly characterizes as prior art ("grooves … mostly 45 degrees"; "prismatic grooves, lenticular grooves, or pyramids").

• § 102 relevance: Reasonable anticipatory art only for a bare grooved-film claim; they lack every differentiating limitation of claims 1, 12 and 13 (discrete non-prismatic individual optical elements, planar+curved combination, varying pattern). Useful principally as § 103 base art.

4.6 US 5,598,280 — Nishio et al. (Jan. 28, 1997) and US 5,600,462 — Suzuki et al. (Feb. 4, 1997)

"Film lens / surface light source" and "Optical film and liquid crystal display device using the film." These are aperture/lens-array and optical-film-plus-LCD art.

• § 102 relevance: Potential § 102 art for the claim 10 "liquid crystal display in close proximity to the film" environment and for the general film-lens-on-a-surface-light-source architecture of claim 1; do not reach the "vary at different locations" and planar/curved limitations.

4.7 Backlight/extraction references — US 5,396,350 (Beeson et al.), US 5,598,281 (Zimmerman et al.), US 5,961,198 (Hira et al.), US 6,027,221 (Ishikawa et al.)

These populate the edge-lit-panel-with-light-extracting-structures space and are the natural art for claims 1, 22, 23, 24 and 25 (deformities that extract light; plural/LED edge sources). I did not verify their abstracts in this session, so I am not assigning specific anticipatory mappings; they should be pulled and read in full before any § 102 position is taken.

4.8 References that cannot be § 102 art as cited

• US 6,712,481, US 6,752,505, US 7,090,389 — parent/priority documents of the same family; excluded.
• JP 2000-280267, JP 2001-166113, WO 01/27527, WO 01/27663, WO 99/42861 — post-date the 1999-02-23 priority date on their face.
• US 6,027,221, 6,091,547, 6,120,280, 6,151,169, 6,505,959 — issued after the priority date; only § 102(e)-eligible to the extent their US filing dates precede Feb. 23, 1999 (not verified here).

5. Bottom line

• No cited reference is a clean, single-reference § 102 anticipation of independent claims 1 or 22, because neither the Wortman nor the Cobb reference (the two closest) discloses the combination of (i) a backlight whose deformities cause a majority of the edge-injected light to exit the output surface — at relatively low angles in claim 1, and at "60 to 70% or more" reflected/refracted in claim 22 — together with (ii) a light-redirecting film bearing a pattern of discrete, well-defined individual optical elements whose size/shape/orientation vary at different locations.
• The strongest § 102 positions, if any, are narrow: US 5,919,551 (Cobb) against claim 8/11/21-type varying-or-randomized pattern claims, and US 5,771,328 (Wortman) against claim 7-type varying-element claims — and both depend on an aggressive reading of "individual optical elements."
• The bulk of the cited art is properly § 103 material, and that is consistent with the record: IPR2014-01359 (using US 5,919,551 as Ex. 1023) was not instituted on the merits, and the later petitions IPR2015-00492 (not instituted) and IPR2015-00757 (settled) likewise did not invalidate the patent.

Verification gaps I am flagging rather than papering over

I did not independently verify the titles/abstracts or US filing dates of roughly thirty of the forty-one US references, nor of the four unverified foreign references. Before any § 102 position is asserted, each should be read against the granted claims in full.

I'll first try to retrieve the actual "Prior Art" / citations section for US 7914196 so my analysis is grounded in the references listed there.

Obviousness Analysis — U.S. Patent 7,914,196 B2 ("Light redirecting film systems having pattern of variable optical elements")

Scope note on sourcing. The Google Patents page for US 7,914,196 (fetched 2026-09-11) shows the "Prior Art" data as: prior-art keywords (light, film, optical elements, backlight, deformities); prior-art date 1999-02-23; priority from US09/256,275; and the family/litigation metadata. The page as delivered did not include the enumerated "References Cited" list, so I retrieved the patent's own front-page References Cited section (the statutory prior art of record) from the issued patent document (Ex. 1001 of IPR2015-00492) and from the uspto.report/justia mirrors of the grant. The §103 grounds below are built on that list plus the references actually asserted against this patent in the PTAB papers that the Google Patents page links to.

1. Legal framework and date

• The application that issued as the '196 patent (US 12/054,680) was filed 2008-03-25 and claims priority back through 11/484,063 → 10/729,113 → 09/909,318 → 09/256,275 (1999-02-23). Because the application was filed before 2013-03-16, pre-AIA 35 U.S.C. § 103(a) governs, with pre-AIA §§ 102(a)/(b)/(e) defining what counts as prior art. The controlling date is 1999-02-23 only for subject matter supported by the 1999 parent; anything first disclosed in the 2001 CIP (09/909,318) gets a 2001-07-19 date. This matters, because nearly every reference on the face of the patent predates both dates.
• The patent carries a terminal disclaimer and is Expired – Fee Related (adjusted expiration 2019-12-26).
• PTAB history (per the Google Patents page): IPR2014-01359 and IPR2015-00492 were Not Instituted – Merits; IPR2015-00757 ended in Settlement. So no merits decision on validity was ever reached — the grounds below are analytically reconstructed, not PTAB-adopted.
• Governing obviousness law: KSR Int'l Co. v. Teleflex Inc., 550 U.S. 398 (2007) (predictable solutions, "obvious to try," design incentives); In re Boesch and In re Applied Materials (optimizing a result-effective variable / reciting a range produces nothing patentable); In re O'Farrell (finite number of identified, predictable solutions vs. "infinite").

Note on family members appearing in the references list — 6,712,481, 6,752,505, 7,090,389 are same-inventor/same-priority family and cannot be combined against the '196 claims (and are disqualified as 102(e) art by pre-AIA § 103(c) to the extent commonly owned).

2. The claim set, decomposed into element groups

Granted claims 1–25. Independent claims are 1 and 22.

Note that element D is the only feature that meaningfully distinguishes independent claims 1 and 22 from the admitted prior art discussed in the '196 specification itself (¶¶[0003]–[0007]): grooved/lenticular/prismatic films, edge-lit backlights with micro-optical extraction surfaces, and two crossed grooved films are all conceded to be old.

3. The prior art of record (as listed on the '196 face) and its mapping

Confidence caveats: I have verified the existence, dates and titles of these references from the patent's own references-cited list. For references marked "Supplies" with only a title-level characterization, I have not independently verified the full disclosure text; a formal rejection would require pin cites to the reference specifications (column/line), which I do not represent as verified here. Two literal-number discrepancies exist between the OCR of Ex. 1001 ("4,906,907" and "5,956,892") and the Google Patents/justia listings ("4,906,070" and "5,056,892"); I have not silently corrected them — the 1990 and 1991 Cobb TIR-film grants are the numbers shown in group/class-based listings, and any office action should confirm against the physical documents.

4. Enumerated § 103(a) grounds

Ground 1 — Ando (5,808,784) in view of Jannson (5,838,403) → claims 1–21

Asserted against this patent in the PTAB papers as the primary 103 ground. Ando (lens-array sheet + edge light source for a transmissive display, issued 1998-09-15) supplies the light-guide/backlight (A), the extraction of light from the guide (B), the overlying lens sheet with well-defined optical elements (C), and the stated objective of uniform luminance across the emitting surface (G). Jannson (collimating backlight + non-Lambertian diffuser, issued 1998-11-17) supplies the deliberate control of the angular distribution (low-angle emission and re-direction into a desired angular range → elements B "relatively low angles," G "toward the normal," and H "collimate along one axis / perpendicular axis"). Together they read on claims 1–21.

Motivation: both references are in the identical field (edge-lit LCD backlights) and address the identical problem — luminance uniformity plus angular control for an LCD — and KSR holds that combining two references disclosed for the same purpose with no change in their respective functions is obvious. Expectation of success is high because each reference independently achieves part of the result the '196 claims (spatially uniform, axis-redirected output).

Ground 2 — Koike (5,982,540) in view of Kaneko (5,769,522) → claims 1–3, 5, 7–13, 18, 19, 21

Koike (surface light source with polarization function; filed 1995-03-13, so 102(e) art) supplies the light-guide backlight with a structured output face (A, B) and the polarizing/light-recycling film over it. Kaneko (two diffusing panels/sheets with saw-tooth protrusions to enhance brightness normal to the panel) supplies the structured output film with sloped elements and varying element geometry (C, D via claim 5's "different slope angles" and claim 7/8's size/density variation, E for claim 12's planar+curved if the saw-tooth profile is rounded).

Motivation: combination of a light-guide and a saw-tooth brightness sheet is the classic pairing in this art (cf. Whitehead 4,542,449, Ohara 5,844,720 and Mimura 6,120,280 all in the same references list). Both references are directed to increasing luminance perpendicular to the panel — one of the "finite number of identified, predictable solutions."

Ground 3 — Koike in view of Hattersley (GB 2 281 802) → claims 24–25

Hattersley (illumination apparatus providing a predetermined light distribution to an LCD, published 1995-03-15) supplies the design intent of a spatially tailored distribution — the natural place to find the claimed laterally spaced focused light sources (cl. 24) and LEDs (cl. 25) along an input edge. Substitution of a linear lamp with a row of point sources (LEDs) at an input edge was a recognized, routine expedient by the critical date, and the '196 specification itself lists LEDs as one of several conventional alternatives (¶[0063]).

Ground 4 — Koike (or Beeson 5,396,350 / Zimmerman 5,598,281) alone → claims 22–23

Claim 22 requires only extraction deformities that cause 60–70% or more of the edge-injected light to exit one surface, plus a redirecting film. That numeric range is not a structural limitation but the natural result of an optimized microprism/micro-optical extraction pattern — precisely what Beeson's microprism array and Zimmerman's tapered-element backlight were designed to achieve. Under In re Applied Materials / Boesch, reciting the observed yield of a result-effective optimization (extraction efficiency) does not confer patentability. Claim 23's rounded side walls for scattering are also met by conventional rounded/curved extraction features (cf. Ishikawa 5,779,338; Ohara 5,844,720).

Ground 5 — Kojima (5,377,084) or Hira (5,961,198), patterned extraction, in view of Wortman (5,771,328) or Cobb (5,919,551) → claims 1, 3–8, 11, 19–21

This is the strongest ground specifically aimed at element D, the only real point of novelty. Kojima/Hira supply an edge-lit guide whose extraction features are patterned (in Hira's case expressly to homogenize output from an LCD backlight). Wortman supplies a light-directing film whose structured surface varies in height across the film, and Cobb supplies a structured optical film with variable pitch. Each of those alone discloses "a pattern of individual optical elements … that vary at different locations on the film"; combining either with an edge-lit guide having a spatially non-uniform output yields the claim 1 combination.

Motivation (this is the crux):

1. Express admission of the problem in the '196 itself. The specification states there is "a need for a light redirecting film that can compensate for the different angular distributions of light that may exist for a particular light source at different positions above the source" (¶[0007]–[0008]) and "a need for a light redirecting film system in which the film is matched or tuned to the light output distribution of a backlight" (¶[0008]). That is an admission that varying the film's optical elements to match a spatially varying source was a known objective — i.e., the motivation.
2. Result-effective variables. Height, pitch, slope angle, size, density and orientation of optical elements are all disclosed in the references (Wortman: height; Cobb: pitch; O'Neill: cutoff profile; JP 10-068803: extraction density) as variables that control output distribution. Optimizing them across the film is routine.
3. Predictability / finite solutions. Once the source is known to be brighter near the lamp and dimmer far from it, the only practical options are to vary element size, density, slope or orientation with distance. That is a finite, predictable set (KSR; O'Farrell is inapposite precisely because the field is not unbounded).
4. No teaching away. None of the references criticize varying the structured features; Wortman and Cobb affirmatively teach it.

Claims 3–8 (tailored size/shape, differing orientation, differing slope, two-axis redirection, varying size, varying density) are each met by the same variation teaching applied to the enumerated characteristics. Claim 11 (randomization) and claims 19–21 are met by the routine use of randomized/pseudo-random patterns, which the '196 concedes were known (halftone, stochastic and random-dot print patterns, ¶[0068]).

Ground 6 — Ground 5 + O'Neill (5,917,664) / WO 98/50806 → claims 12–13 and G

Claim 12 (planar + curved surfaces) and claim 13 (area ratio chosen for a desired viewing angle) are met by "soft-cutoff" brightness-enhancement structures, which by definition mix curved and flat facets to control the angular cutoff. Choosing the flat:curved ratio to hit a target viewing angle is optimizing a result-effective variable with a predictable outcome.

Ground 7 — Ground 5 + Suzuki (5,600,462) or Ishikawa/Akahane → claim 10

Placing the film in close proximity to an LCD to improve the ray-angle distribution entering the panel is disclosed by Suzuki (optical film + LCD) and, again, admitted by the '196 specification (¶[0067]: light output "will be more efficient if … a light redirecting film is used in combination with the backlight [to] direct the light rays … such that they will pass through the liquid crystal display with low loss").

Ground 8 — Beeson / Zimmerman + any of the above films → claims 14–17

Overlap, intersection, interlocking and staggering are ordinary packing geometries for covering a surface with small optical elements with minimal dead area — the '196 itself uses them for the stated purpose of "excellent surface area coverage" (¶[0014], ¶[0050]). Using them is a design choice within the ordinary skill of a lens-array/microprism designer.

5. Claim-by-claim summary of the strongest ground

6. Rebuttal considerations (what a patent owner would argue, and how it fares)

• "Vary at different locations" is not expressly disclosed in one reference. Correct — this is why the case is a § 103 case and not a § 102 case for claims 1 and 22. It is defeated by the Wortman/Cobb variable-height/variable-pitch showings, which use essentially the same words the claim does.
• Teaching away. The specification's own disparagement of uniform-angle grooves is the inventor's characterization of the prior art, not a teaching away by the references themselves; it simultaneously supplies the motivation to vary the features.
• Objective indicia. No evidence of nexus, unexpected results, copying or industry praise is in the record I reviewed. Absent such evidence, the numeric "60–70% or more" and "relatively low angles" recitations do not rebut a prima facie case.
• Priority-date attack. If any claim limitation (especially "relatively low angles" and the variation/grouping concepts) is found to lack written-description support in the 1999 parent 09/256,275, the effective date slides to 2001-07-19, which brings additional art into play (e.g., JP 2000-280267, JP 2001-166113, WO 01/27527, WO 01/27663, and the 3M/Japanese luminance-control and directional-diffusing films), strengthening the grounds rather than weakening them.
• Procedural posture. The two instituted-attempt IPRs were not instituted on the merits and the third settled, so none of these grounds has been adjudicated. That cuts both ways: it means there is no adverse estoppel or PTAB reasoning to overcome, but also no confirmed unpatentability finding.

7. Bottom line

Under pre-AIA § 103(a) and KSR, every element of every claim of the '196 has a clear antecedent in the references of record, and the single feature that separates the independent claims from the admitted art — a pattern of discrete, well-defined-shape optical elements that varies across the film — is squarely taught by Wortman (5,771,328, variable height) and Cobb (5,919,551, variable pitch), and is motivated by the '196 specification's own statement of the problem (compensating for a light source whose directional output changes with position and "tuning" the film to the backlight output). The most defensible grounds, and the ones a petitioner would lead with, are:

1. Kojima (5,377,084) or Hira (5,961,198) + Wortman (5,771,328) or Cobb (5,919,551) → claims 1, 3–8, 11, 14–17, 19–21;
2. Ando (5,808,784) + Jannson (5,838,403) → claims 1–21;
3. Koike (5,982,540) + Kaneko (5,769,522) → claims 1–3, 5, 7–13, 18, 19, 21;
4. Koike + Hattersley (GB 2 281 802) → claims 24–25; and
5. Beeson (5,396,350) / Zimmerman (5,598,281) → claims 22–23, the 60–70% value being the predictable result of optimizing a result-effective variable rather than a patentable limitation.

Confidence: high on claim construction, on the reference inventory and dates, and on the legal framework; medium on the precise disclosure content of individual references, which I have characterized at the level available from titles, abstracts and the PTAB summaries rather than from full-text pin cites. Every ground above should be confirmed with column/line citations to the actual reference documents before being relied upon in a filing. This is technical analysis, not legal advice.