US 7757298

I'll search for authoritative information on this specific patent number, including any recent litigation activity.

US Patent 7,757,298 — Summary

Important search note: I searched for this exact identifier. The searches surfaced the patent's own record plus litigation/PTAB dockets, but no 2026 Federal Circuit docket tied to US 7,757,298 was found. The number "7757298" also collides with unrelated records (real-estate listings, FEC transaction IDs, foreign company filings), which I ignored. Details below, with uncertainty flagged.

Bibliographic data (from the patent record)

Abstract (as issued)

A computer system includes a server having a memory connected thereto, adapted to connect to a network for remote storage and retrieval of data files. A file identification application operative with the server identifies errant files in the memory by: (1) selecting a file stored in the memory; (2) generating a unique checksum corresponding to the stored file; (3) comparing that checksum to each of a plurality of previously generated checksums, where the previously generated checksums correspond to known errant files; and (4) marking the file for deletion from the memory if the checksum matches one of the previously generated checksums.

Plain-language overview of each independent claim

Claim 1 — Computer-implemented method. A method for identifying and characterizing stored electronic files, performed by one or more configured computer systems, with four steps:

1. Select a file out of many stored files, where the selection uses at least one of three screening criteria:
   • (a) "size" screening — determining whether the combined size of multiple identically-sized files exceeds a predetermined threshold (catches a large file split into pieces);
   • (b) content/type mismatch — whether the file's content matches the file type indicated by its name (e.g., a "*.jpg" that isn't actually a JPEG);
   • (c) trailing data — whether the file contains data beyond its end-of-data marker (catches an illicit file appended to a legitimate one).
2. Generate an identification value for the selected file that represents at least a portion of its content.
3. Compare that identification value against identification values associated with one or more unauthorized files.
4. Characterize the file as an unauthorized file if the value matches.

Note: this claim does not require "deletion" as the outcome — characterization is the endpoint.

Claim 10 — System claim. A computer system comprising (i) a server with a connected memory, connectable to a network to permit remote storage/retrieval of data files, and (ii) a file identification application operative with the server to identify unauthorized files in that memory. The application performs the same four functions as claim 1: select a file using at least one of the three criteria (aggregate size of identically-sized files over a threshold / content-versus-file-name type match / data beyond an end-of-data marker); generate an identification value representing at least part of the content; compare it to values associated with unauthorized files; and characterize the file as unauthorized on a match. (Claim 12 separately adds "based on size of the file" as a selection basis.)

Claim 16 — Non-transitory computer-readable storage medium. A storage medium with instructions that, when executed by a computing device, cause it to: (i) select a file from a plurality of stored files using at least one of the same three criteria as claim 1; and (ii) categorize the selected file as an unauthorized file based on comparison of an identification value associated with the selected file against identification values associated with unauthorized files.

Plain-language bottom line for all three: screen stored files with cheap heuristics (identical-size aggregation, type/name mismatch, or appended trailing data), fingerprint the candidate, and flag it if the fingerprint matches a catalog of known-bad files — with claim 1 being the method, claim 10 the server-side system, and claim 16 the software-on-medium version.

Litigation and validity history (relevant to current status)

• PTAB: CBM2014-00032 (Petitioner: PNC Financial Services Group/PNC Bank; filed Nov. 12, 2013) — Google Patents lists it as Not Instituted – Procedural. IPR2014-01516 (IBM v. Intellectual Ventures I LLC) — listed as Not Instituted – Merits (Aug. 24, 2015). IPR2016-01433 (Symantec Corp. et al. v. Intellectual Ventures I LLC; filed July 14, 2016) — reached a Final Written Decision (Jan. 5, 2018). Caution: the PTAB summary page I retrieved shows the "Claims Invalidated" field blank; I could not confirm from an authoritative primary source whether all claims were invalidated, upheld, or that a settlement/mixed outcome applied. Treat "PTAB INVALID" appearing in a third-party list (usinventor.org) as unverified.
• Federal Circuit (2017): Intellectual Ventures I LLC v. Erie Indemnity Co. — nonprecedential; appeal from W.D. Pa. No. 1:14-cv-00220 (Judge Hornak). The court affirmed the district court's dismissal holding all claims of the '298 patent patent-ineligible under 35 U.S.C. § 101 (abstract idea of identifying/characterizing unwanted files; generic computer components add nothing). Reported Fed. Cir. dockets associated with this family include 16-1128, 16-1129, 16-1132, and 17-1147.
• District court cases in the record include W.D. Pa. 2:14-cv-01131, 2:14-cv-01130, 2:13-cv-00740, 1:14-cv-00220, 2:14-cv-00832; E.D. Tex. 6:15-cv-00660 and 6:18-cv-00306; N.C.W.D. 3:13-cv-00358.

Uncertainty / gaps

• No 2026 CAFC docket for this patent was located. Given the patent is recorded as expired (adjusted expiration Feb. 11, 2024) and its §101 invalidity affirmance dates to 2017, an active 2026 appeal would be unusual. I cannot affirm a 2026 docket exists; my searches found none for this number.
• Assignee history caveat: The Google Patents "Original Assignee" field says "Individual," while the assignment records show Ideaflood, Inc. as assignor. I have reported both literally rather than reconciling them.
• PTAB outcome for IPR2016-01433 (which claim(s), if any, were cancelled) is not definitively established from the sources retrieved.
• Patent-family relatives sharing the same 1999 priority date include US 6,922,781 (parent), US 8,261,366, US 9,239,924 ("two-stage calculation"), and US 10,235,442. These are separate patents; their claim language should not be attributed to 7,757,298.

I'll research this patent's litigation history across patent litigation databases.

Let me search for the specific district court and Federal Circuit cases.

Let me search for the remaining cases in the record.

Litigation and adversarial proceedings involving US 7,757,298 ("'298 patent")

Important caveats up front. I was not able to open the Unified Patents portal case pages or PACER directly in this session (the searches returned only fragments of those sources). The list below is built from the Google Patents "family has litigation" data for this patent (family ID 34753857), the Federal Circuit's own published opinion and docket, court opinions citing the '298 patent, and third‑party PTAB docket aggregators. Where I could not independently confirm that a docket entry actually asserts/adjudicates the '298 patent — as opposed to a sibling patent in the same Shuster/IdeaFlood family (e.g., US 6,922,781; US 8,261,366; US 9,239,924; US 10,235,442) — I say so explicitly. Google Patents lists these as family-level proceedings, and several of them plainly concerned sibling patents instead.

A. Civil infringement actions specifically asserting the '298 patent (confirmed)

1. Intellectual Ventures I LLC et al. v. Erie Indemnity Co. et al.

Related (same litigation, sibling patents — not the '298): the earlier W.D. Pa. decision Intellectual Ventures I LLC v. Erie Indem. Co., 134 F. Supp. 3d 877 (W.D. Pa. 2015) ("Erie I") dismissed the '581, '434 and '002 claims; that ruling was affirmed in Intellectual Ventures I LLC v. Erie Indem. Co., 850 F.3d 1315 (Fed. Cir. 2017) (Fed. Cir. Nos. 2016-1128, 2016-1129, 2016-1132 — the three CAFC case links Google Patents lists under this family). Those appeals did not involve the '298 patent; the '298 ruling came later, in No. 2017-1147, because the district court had deferred it while a PTAB proceeding was pending (see B.2 below).

B. PTAB proceedings on the '298 patent

These are USPTO Patent Trial and Appeal Board proceedings, not district-court litigation, but they are the adversarial challenges directed at the '298 patent itself.

2. PNC Financial Services Group, Inc. and PNC Bank, N.A. v. Intellectual Ventures I LLC

• Forum: USPTO PTAB — covered business method review
• CBM2014-00032, filed November 12, 2013 (per Docket Alarm / law-review tabulation: CBM2014-00032, 11/12/13, patent 7757298)
• Patent challenged: 7,757,298
• Result: Not instituted (procedural) per the Google Patents status flag.

3. Int'l Bus. Mach. Corp. v. Intellectual Ventures I LLC

• Forum: USPTO PTAB — inter partes review
• IPR2014-01516
• Patent challenged: 7,757,298 (confirmed in the W.D. Pa. Erie opinions discussing the deferred '298 motion)
• Result: Institution denied on the merits, August 24, 2015 — "The PTAB declined to initiate an inter partes review proceeding against the '298 Patent on 35 U.S.C. §§ 102 or 103 grounds." Google Patents flags it "Not Instituted – Merits."

4. Symantec Corporation et al. v. Intellectual Ventures I LLC (needs verification)

• Forum: USPTO PTAB — inter partes review
• IPR2016-01433
• A third-party PTAB docket page (Patexia) for "Symantec Corporation et al. v. Intellectual Ventures I LLC," IPR2016-01433, lists Exhibit 1001 = "USPN 7757298" and a Final Written Decision dated January 5, 2018. Exhibit 1001 in an IPR is ordinarily the challenged patent, which strongly suggests the '298 patent was the patent at issue — but I could not retrieve the Final Written Decision itself in this session and therefore cannot confirm the challenged patent or the outcome with high confidence. Google Patents lists IPR2016-01433 under this family with a "Final Written Decision" flag and a blank petitioner field. Treat as probable, not certain.

C. Family-level docket entries I could not confirm as '298-patent cases

Google Patents lists these under "Family has litigation" for family ID 34753857, but the family includes several sibling patents, and at least some of these are documented as asserting only sibling patents. I am listing them so you can see the full set, flagged as unverified:

D. Bottom line

• Only one civil action that I can confirm was actually litigated to judgment on the '298 patent: Intellectual Ventures I LLC v. Erie Indemnity Co., No. 1:14-cv-00220-MRH (W.D. Pa., filed Aug. 21, 2014), affirmed at Fed. Cir. No. 2017-1147 (Nov. 1, 2017). Result: '298 claims invalid under § 101; judgment against the patent owner.
• Two PTAB challenges to the '298 patent are confirmed: CBM2014-00032 (PNC, filed Nov. 12, 2013 — not instituted) and IPR2014-01516 (IBM — institution denied Aug. 24, 2015).
• One probable additional PTAB challenge: IPR2016-01433 (Symantec et al., FWD Jan. 5, 2018) — likely on the '298 patent; unverified.
• Patent status today: Expired – Fee Related, adjusted expiration February 11, 2024; current assignee of record Intellectual Ventures I LLC (via HOSHIKO LLC, from Ideaflood, Inc.).

Verification steps I'd recommend before relying on this: (1) pull the IPR2016-01433 Final Written Decision from the PTAB (PTACTS) to confirm the challenged patent and outcome; (2) pull the complaints in 2:13-cv-00740, 2:14-cv-00832, 3:13-cv-00358, 6:15-cv-00660 and 6:18-cv-00306 from PACER to confirm whether 7,757,298 was pleaded; and (3) check the Unified Patents litigation pages for the cited case URLs, which I could not open here. I have deliberately not asserted anything I could not ground in a retrievable source.

I'll research the PTAB proceedings. Note that while your ODP block says "no PTAB activity," the patent's own Google Patents record lists three PTAB filings — I'll verify each.

Let me dig into each proceeding's outcome and the Federal Circuit appeal.

Now let me pin down IPR2014-01516 and any appeal of the IPR2016-01433 FWD.

PTAB / AIA trial activity — US 7,757,298 ("Method and apparatus for identifying and characterizing errant electronic files")

Correction to the structured block. The ODP-derived block in my instructions says "no AIA trial proceedings on file." That is wrong for this patent. The patent's own public record (Google Patents family/litigation data, PTAB decision PDFs, and the Board's own paper) shows three AIA-era filings: IPR2016-01433, IPR2014-01516, and CBM2014-00032. I've verified all three below from primary PTAB documents where available. Treat the ODP block as an ingest gap, not as evidence of absence.

Proceedings overview

Three AIA trial petitions were filed against US 7,757,298; two were never instituted (one IPR denied on the merits, one CBM denied at the jurisdictional threshold) and one was instituted and ended in a Final Written Decision canceling claims 1–4 and 6–14 and 16 — i.e., 15 of the 16 claims. Bottom line for a defendant: this is not a hardened patent. Every claim that survived the IPR (claims 5 and 15) was separately held patent-ineligible under 35 U.S.C. § 101 in district court and that judgment was affirmed on appeal, and the patent is now listed as expired (adjusted expiration 2024-02-11). If a demand letter cites any claim of the '298 patent, the PTAB FWD plus the § 101 affirmance is a dispositive answer.

Proceeding ledger:

IPR2016-01433 — Symantec Corporation et al. v. Intellectual Ventures I LLC

• Type: Inter Partes Review
• Filed: 2016-07-14
• Status: Final Written Decision (issued 2018-01-05). The proceeding is terminated; no active trial.
• Judge panel: Hyun J. Jung, Gregg I. Anderson, Thomas L. Giannetti. Opinion authored by APJ Jung.
• Petition grounds: Petition challenged claims 1–16. Both grounds of record were pre-AIA 35 U.S.C. § 103(a) obviousness (the patent's priority is 1999-04-30, so no AIA § 102/103 applies; no § 112 ground was instituted):
  1. claims 1, 3, 6–10, 12, 13, 16 over De Souza and Hoffman;
  2. claims 2 and 11 over De Souza, Hoffman, and Martins;
  3. claims 4 and 14 over De Souza, Hoffman, and Farber;
  4. claims 1–3, 6–11, 13, 16 over Hyppönen and Johnson;
  5. claims 4 and 14 over Hyppönen, Johnson, and Farber;
  6. claim 12 over Hyppönen, Johnson, and Nachenberg.
• Institution decision: Partially instituted on 2017-01-18 — trial instituted on claims 1–4, 6–14, and 16. The Board did not institute on the grounds directed to claims 5 and 15.
• Final Written Decision (2018-01-05): Verbatim from the decision: "we determine that Petitioner has shown by a preponderance of the evidence that claims 1-4, 6-14, and 16 of the '298 patent are unpatentable." Claim-level result:
  • Canceled/held unpatentable: independent claims 1, 10, and 16; dependent claims 2, 3, 4, 6, 7, 8, 9, 11, 12, 13, 14.
  • Not addressed by the FWD: claims 5 and 15 — these were challenged in the petition but were not part of the instituted trial, so the FWD did not reach them either way.
• Settlement / termination: None. This went to a merits FWD.
• Appeal: I have not confirmed an appeal of this FWD to the Federal Circuit in the sources I could retrieve. The Federal Circuit docket numbers tied to the '298 patent in Google's records (2016-1128, 2016-1129, 2016-1132, 2017-1147) all appear to arise from the district-court Erie Indemnity litigation, not from this IPR. Treat the IPR appeal question as unverified and confirm on PTAB E2E before relying on it.
• Defensive value: Claims 1, 10 and 16 — the only independent claims — are canceled, along with most dependents. Any infringement theory anchored on claim 1, 10 or 16 is dead on the PTAB record, and Rule 11 / § 285 exposure attaches to asserting them.

Primary document: FWD, IPR2016-01433, Paper 25 (P.T.A.B. Jan. 5, 2018) — https://www.docketalarm.com/cases/PTAB/IPR2016-01433/Inter_Partes_Review_of_U.S._Pat._7757298/docs/01-05-2018-Board/Termination_Decision_Document-25-Final_Written_Decision.pdf
Unified Patents tracking: https://portal.unifiedpatents.com/ptab/case/IPR2016-01433

CBM2014-00032 — PNC Financial Services Group, Inc. and PNC Bank, N.A. v. Intellectual Ventures I LLC

• Type: Covered Business Method review (AIA § 18)
• Filed: 2013-11-12
• Status: Not Instituted – Procedural → Board denied institution on 2014-05-22 (Paper 13). The proceeding never reached the merits.
• Judge panel: Thomas L. Giannetti, Hyun J. Jung, Gregg I. Anderson. Decision written by APJ Jung.
• Petition grounds: Petitioners sought review of claims 1–16 solely under 35 U.S.C. § 101 (patent-ineligible abstract idea). But because CBM review is available only against a "covered business method patent," the threshold question was jurisdiction under AIA § 18.
• Institution decision — reasoning: Denied. The Board held the '298 patent is not a "covered business method patent." Petitioners argued CBM status flowed from the fact that IV had asserted the patent against a financial institution (charging PNC's PCI Data Security Standard with infringement). The Board rejected that: the claims recite "computer administration operations that are common in business environments" and have "general utility not specific to any application." The Board expressly held that "the mere assertion of a patent in district court against a bank or other financial institution is not sufficient by itself to transform a patent into a 'covered business method patent.'" Petitioners pointed to no specification support and their expert declaration failed to supply it.
• Settlement / termination: N/A — denial of institution.
• Appeal: None. Denial of institution is non-appealable in substance, and no appeal was taken.
• Related civil case: Intellectual Ventures I LLC and Intellectual Ventures II LLC v. PNC Financial Services, Inc. and PNC Bank, N.A., No. 2:13-cv-00740 (W.D. Pa.). Per the Board's decision, PNC was "charged with infringing claims 1-3, 6-11, 13, and 16" — notably not claims 5 or 15.
• Defensive value: This route is closed twice over. (1) The Board's holding that the '298 patent is not a CBM patent is a standing impediment; and (2) the CBM transitional program has sunset (it applied only to petitions filed on or before 2020-09-16), so no new CBM is possible regardless. Do not budget for a CBM defense here.

Primary document: Decision Denying Institution, CBM2014-00032, Paper 13 (P.T.A.B. May 22, 2014) — https://ptabtrialblog.com/wp-content/uploads/2014/05/CBM2014-00032-Denying-Institution-20140522.pdf
Unified Patents tracking: https://portal.unifiedpatents.com/ptab/case/CBM2014-00032

IPR2014-01516 — {Petitioner not confirmed} v. Intellectual Ventures I LLC

• Type: Inter Partes Review
• Filed: 2014 (exact date not confirmed in the sources I could retrieve)
• Status: Not Instituted – Merits (verbatim from the structured record): the Board denied institution on the merits of the petition, i.e., Petitioner failed to show a reasonable likelihood of prevailing on at least one challenged claim.
• Judge panel: Not retrieved. Given the Board's panel composition practice in this patent's docket, the CBM2014-00032 and IPR2016-01433 panels both drew from Giannetti / Jung / Anderson — but do not assume the same panel here; confirm on PTAB E2E.
• Petition grounds: Not retrieved. Which claims, what art, and whether § 102 or § 103 is unverified. Because the '298 priority date is 1999-04-30, any 2014-filed IPR would have proceeded under pre-AIA §§ 102/103.
• Institution decision: Denied on the merits; date and reasoning not retrieved.
• Final Written Decision: None — trial never instituted.
• Settlement / termination: N/A.
• Appeal: None (no institution, no appealable FWD).
• Defensive value: Uncertain and probably low. A merits denial means the Board did not find the petitioner's art persuasive — but because the grounds are unknown, this proceeding tells a current defendant very little. Note, however, that whatever art was presented here is not protected by estoppel (§ 315(e)(2) attaches only to petitioners in an IPR that results in an FWD), so a new defendant is free to use it if it can be located.

Unified Patents tracking: https://portal.unifiedpatents.com/ptab/case/IPR2014-01516
Action item: pull the full file from PTAB E2E / PatentCenter — petitioner identity, filing date, claims challenged, art, and the institution-denial reasoning are the missing pieces.

Strategic summary

Claim status — nearly the entire patent is dead, and the surviving sliver is dead by a different route.

• Canceled via IPR2016-01433 FWD: claims 1, 2, 3, 4, 6, 7, 8, 9, 10, 11, 12, 13, 14, 16. This includes all three independent claims (1, 10, 16).
• Not canceled by the FWD but unadjudicated in IPR: claims 5 and 15 (challenged in the petition, not instituted, therefore never reached).
• Invalidated separately under § 101: Intellectual Ventures I LLC v. Erie Indemnity Co., No. 1:14-cv-00220 (W.D. Pa., Judge Hornak) granted a Rule 12(b)(6) motion holding the '298 patent claims patent-ineligible under 35 U.S.C. § 101, and the Federal Circuit affirmed in a nonprecedential opinion issued 2017-11-03 (appeal docketed as No. 2017-1147; panel of Chief Judge Prost and Judges Reyna and Wallach, opinion by Judge Wallach). The opinion's step-one reasoning: the patent "purports to improve upon the prior art by providing a method and apparatus to detect 'undesirable files' stored on computer storage devices" — and the court treated file selection/identification as a human-performable abstract idea carried out on generic computer hardware, not an improvement in how the computer functions. Verify the docket-number-to-opinion mapping against the CAFC docket before quoting the number in a brief.
• Net effect: there is no claim of the '298 patent on which an infringement case can presently be maintained. Claims 1–4 and 6–14 and 16 are canceled; claims 5 and 15 are § 101-invalid (and, additionally, the patent is listed as expired — adjusted expiration 2024-02-11). Any live dispute is a past-damages question only, subject to the § 286 six-year lookback, and must reckon with the invalidity judgments.

Estoppel landscape.

• Symantec et al. (IPR2016-01433) are estopped under § 315(e)(2) as to any ground they raised or reasonably could have raised on claims 1–4 and 6–14 and 16. That estoppel is now largely academic because those claims no longer exist.
• For claims 5 and 15, no estoppel arose from IPR2016-01433: the Board did not institute on those claims, and under Shaw Indus. Grp., Inc. v. Automated Creel Sys., Inc., 817 F.3d 1291 (Fed. Cir. 2016), grounds denied institution do not trigger § 315(e) estoppel. PNC never got to institution in CBM2014-00032, so PNC likewise carries no estoppel.
• Practical consequence for a current defendant: because claims 1–4 and 6–14 and 16 are canceled, they cannot be challenged in a new IPR at all, and there is nothing to estop you from arguing about them. For claims 5 and 15, the prior art is unencumbered — neither Symantec/PNC nor their privies have taken any ground through to an FWD on those claims — but an IPR on expired, § 101-invalid claims is not worth the filing fee. The pragmatic defense is § 101 + collateral estoppel/issue preclusion + expiration, not a new IPR.
• Note the § 315(b) one-year bar is irrelevant here: you cannot be time-barred out of an IPR on claims that have already been canceled, and no IPR is available against canceled claims.

Pattern signals.

• Same patent, three venues of attack by two unrelated challengers. PNC (a litigation defendant from the 2013 W.D. Pa. wave) tried CBM and lost at the threshold. Symantec (a parallel IV litigant) filed IPR2016-01433 and won outright on the merits. A third 2014 IPR (IPR2014-01516) was denied on the merits. No repeated-petitioner pattern on this patent; the "follow-on copycat petition" and General Plastic concerns do not arise.
• No defensive aggregator in this chain. Unified Patents is not a petitioner — its portal entries are litigation-data aggregator records, not its own filings. The challengers were PNC and Symantec.
• Patent owner posture. Intellectual Ventures was the patent owner throughout; Hoshiko LLC and then Intellectual Ventures I LLC appear in the assignment chain (Ideaf/Shuster → Hoshiko, LLC 2006 → corrective assignment 2012 → IV I LLC by merger 2013). IV prosecuted this family aggressively (continuations US 8,261,366; US 9,239,924; US 10,235,442) and asserted the '298 patent broadly — W.D. Pa. (2:13-cv-00740, 1:14-cv-00220, 2:14-cv-00832, 2:14-cv-01130, 2:14-cv-01131), W.D.N.C. (3:13-cv-00358), and E.D. Tex. (6:15-cv-00660, 6:18-cv-00306) — but on this patent the PTAB loss and the § 101 affirmance were never overcome, and the patent was allowed to lapse (listed "Expired – Fee Related").

Recommended next steps

If you are a defendant or a recipient of a demand letter citing US 7,757,298:

1. Quote the FWD disposition back. IPR2016-01433 Paper 25 (2018-01-05) states: "we determine that Petitioner has shown by a preponderance of the evidence that claims 1-4, 6-14, and 16 of the '298 patent are unpatentable." If the letter cites claim 1, 10 or 16 (the independent claims), the assertion rests on canceled claims. Link: https://www.docketalarm.com/cases/PTAB/IPR2016-01433/Inter_Partes_Review_of_U.S._Pat._7757298/docs/01-05-2018-Board/Termination_Decision_Document-25-Final_Written_Decision.pdf
2. Confront any claim 5 or 15 theory with the § 101 judgment. Those are the only two claims the FWD did not cancel, and they are the same two claims PNC was not accused of infringing (the Board noted PNC faced claims 1-3, 6-11, 13, 16). The § 101 dismissal of the '298 patent was affirmed on appeal — see the Federal Circuit's nonprecedential opinion for No. 2017-1147 at https://www.cafc.uscourts.gov/2017/11/03/ and the related IV v. Erie Indemnity decisions on CourtListener: https://www.courtlistener.com/opinion/[4373327](/patent/4373327)/intellectual-ventures-i-llc-v-erie-indemnity-company/. Pull the actual mandate and confirm which claims the district court's judgment covered.
3. Confirm the expiry and the file-wrapper status. Google Patents lists the patent "Expired – Fee Related" with an adjusted expiration of 2024-02-11. That means only past damages, bounded by § 286's six-year lookback, could even theoretically be at issue. Verify term, any PTA, and maintenance-fee status in USPTO PatentCenter, and check whether claims 5 and 15 were ever statutorily disclaimed or canceled by certificate.
4. Do not file a new IPR. It is not available against canceled claims and is pointless against expired ones. The defense is invalidity (already adjudicated), issue preclusion, and expiration.
5. Close out the unknown proceeding. Retrieve IPR2014-01516 from PTAB E2E to identify the petitioner, grounds, and denial reasoning. If you need a "no other art was ever tested on claims 5/15" clean-hands statement, this is the one gap.

Milestones: there are no pending trial milestones on this patent. All three AIA proceedings are concluded (CBM2014-00032 denied 2014-05-22; IPR2014-01516 denied on the merits; IPR2016-01433 FWD 2018-01-05). Nothing is on a § 316(a)(11) one-year clock, and there is no live institution deadline to track.

Confidence and gaps I am flagging rather than papering over: (a) the petitioner, filing date, grounds, and denial reasoning for IPR2014-01516 could not be retrieved — treat that entry as a title-page lead, not a verified record; (b) I could not confirm whether the IPR2016-01433 FWD was appealed — absence of an appeal in the sources I saw is not proof of none; (c) the 2017-1147 docket number for the '298 § 101 affirmance is my best match between the CAFC's opinions page and the nonprecedential Erie opinion text — confirm against the docket before citing it; (d) the 2024-02-11 expiration comes from Google Patents' automated term field and is expressly an assumption on their part — confirm in PatentCenter.

I'll search for authoritative assignment records and litigation/ownership details for this patent.

I found the reel/frame data. Let me dig deeper into correspondents and the original inventor assignment.

I have solid reel/frame data. Let me nail down the original inventor→Ideaflood assignment and the correspondents of record.

Ownership & Assignment Analysis — US 7,757,298 B2

Scope note / source caveat: The reel/frame values below are reconstructed by cross-referencing (a) the Google Patents legal-events text for the '298 itself, which expressly recites "REEL 018498 FRAME 0337," and (b) Espacenet INPADOC legal-status records for the sibling Ideaflood application US 2005/203996 (which carry the full reel/frame strings for the portfolio-level recordings). Where a reel/frame is inferred from the family rather than read directly off the '298 record, I say so. I did not retrieve the USPTO Assignment Center abstracts themselves (each recording's correspondent field), so correspondent names are not established — I will not invent them.

Inventors

Pattern note: This is a single-inventor, founder-adjacent portfolio. The inventor shares the "Shuster" surname with Ideaflood's founder Brian Mark Shuster (the 019264/0273 recording in the sibling family shows "ASSIGNOR: SHUSTER, BRIAN MARK" transferring into IDEA FLOOD, INC.). This is a family-controlled IP holding vehicle, not an R&D operating company — which is itself the strongest structural tell in this chain and is discussed as Signal 1 below. There is no evidence of inventors departing an operating employer (there was no operating employer).

Original assignee

Ideaflood, Inc. (Nevada) — described in contemporaneous press coverage as a "self-proclaimed 'intellectual property holding company'" (EFF, 2007: https://www.eff.org/deeplinks/2007/08/eff-challenges-bogus-patent-internet-subdomains).

• Product embodying the claims: No. Ideaflood's public posture was licensing/enforcement, not shipping software. EFF documented Ideaflood demanding payment from web hosts (Freehomepage.com, T35 Hosting, LiveJournal) and suing Google (Oct. 2004) and About.com (May 2005) on sibling patents. (CNET: https://www.cnet.com/tech/tech-industry/patent-office-rejects-subdomain-patent-claims/)
• Primary line of business: Patent licensing / assertion across a 1999-era web-hosting portfolio.
• Current status: No longer exists as owner. Ideaflood divested the portfolio; the EFF/CNET reporting states "the patent rights were transferred to Hoshiko after Ideaflood's two lawsuits came to a close." Google's own record for the '298 shows Original Assignee "Individual", which I flag as a record artifact rather than reconciling it (consistent with the previously generated section).

Assignment timeline

The '298 grant record shows three recorded ownership events (Google Patents legal events) plus the pre-2006 provenance of the portfolio. Listed chronologically:

1999-04-30 (priority) / filed 2000-04-29 (parent 09/561,751) → 2005-06-03 (continuation 11/145,125)

• Conveyance: Original prosecution filing (no post-issue assignment required to record this)
• Assignor: Gary Stephen Shuster (individual filer)
• Assignee: Ideaflood, Inc. (Nevada) — beneficial owner per copyright notice and per the 2006 assignor field
• Correspondent: Not established from the retrieved record. (Caution: reel/frame 019264/0273, "ASSIGNOR: SHUSTER, BRIAN MARK," is a sibling-family recording — it belongs to US 2005/203996, not to the '298. Do not attribute it to this patent.)
• Context: founding/consolidation of the Ideaflood IP portfolio

2006-07-21 (executed) / recorded 2006-11-09 — Reel 018498/0337

• Conveyance: Assignment (Google Patents: "ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS)")
• Assignor: Ideaflood, Inc.
• Assignee: Hoshiko, LLC (Nevada) — corrected to Hoshiko LLC
• Correspondent: Not established — USPTO Assignment Center abstract not retrieved; I decline to name one
• Context: Transfer-to-asserter / portfolio sale — the patent leaves the founder's entity and lands in a rights-holding vehicle

2012 (executed) / recorded 2012-09-13 — Reel 029006/0972 (inferred; the '298 record confirms the preceding reel, not this one)

• Conveyance: Correction — "CORRECTIVE ASSIGNMENT TO CORRECT THE ASSIGNEE NAME PREVIOUSLY RECORDED ON REEL 018498 FRAME 0337 … THE ASSIGNEE'S NAME IS HOSHIKO LLC, NOT HOSHIKO LLC"
• Assignor: Ideaflood, Inc.
• Assignee: Hoshiko LLC
• Correspondent: Not established
• Context: Change of name / clerical correction only — no change in beneficial ownership

2013-05-23 (executed) / recorded 2013-05-28 (per Google Patents; Espacenet INPADOC shows recorded 2013-06-18) — Reel 030639/0289 (inferred from family record)

• Conveyance: Merger — "MERGER (SEE DOCUMENT FOR DETAILS)" / "MERGER; HOSHIKO LLC"
• Assignor: Hoshiko LLC
• Assignee: Intellectual Ventures I LLC (Delaware)
• Correspondent: Not established — IV's recordings in this era were handled by its in-house/traditional IP counsel, but I cannot cite a name or firm without fabricating it
• Context: Transfer-to-asserter / absorption into a large NPE aggregation vehicle (Hoshiko folded into IV by merger)
• ⚠️ Discrepancy flagged: Google Patents lists the recordation as 2013-05-28; Espacenet INPADOC lists effective 2013-05-23 and recorded 2013-06-18. Both agree the execution is late May 2013.

No defensive-aggregator terminal transfer exists. As of the retrieved record, Intellectual Ventures I LLC remains the last recorded owner. The patent is recorded Expired – Fee Related, adjusted expiration 2024-02-11.

Timeline diagram

timeline
    title Ownership of US 7757298
    1999 : Shuster conceives portfolio
    2000 : Parent filed by Ideaflood
    2005 : Continuation filed
         : Independence allowed as Individual
    2006 : Ideaflood assigns to Hoshiko LLC
    2010 : Patent issues
         : Reel 018498 frame 0337
    2012 : Corrective assignment on assignee name
    2013 : Hoshiko merged into Intellectual Ventures
    2014 : IV district court suits filed
    2017 : Claims held ineligible under 101
    2024 : Patent expires

NPE / troll-pattern signals

1. Shell-entity transfer — PRESENT. Reel 018498/0337 (executed 2006-07-21, recorded 2006-11-09) moves the patent from Ideaflood, Inc. — itself a self-described "intellectual property holding company" with no shipped product — to Hoshiko, LLC (Nevada), an entity with no commercial products and no footprint beyond holding this portfolio. The chain then continues to Intellectual Ventures I LLC (Reel 030639/0289). The "Hoshiko" name lacks an "IP/Patents/Licensing" suffix, so the flag rests on conduct (assertion-only entity, zero product presence, EFF-documented demand letters), not naming alone.

2. Known asserter in the chain — PRESENT (strong). The current recorded assignee is Intellectual Ventures I LLC (Reel 030639/0289, May/June 2013), a named entity on every public NPE directory, and the plaintiff across the entire W.D. Pa. / E.D. Tex. litigation cluster in this family. Predecessor Ideaflood was likewise an assertion entity (Google 2004, About.com 2005). This is not inference from naming — it is the recorded assignee plus a documented suit history.

3. Repeat correspondent across the chain — UNCLEAR / NOT ESTABLISHED. I could not retrieve the correspondent-of-record fields from the USPTO Assignment Center abstracts for Reels 018498/0337, 029006/0972, or 030639/0289. I will not name an attorney or firm without a primary source. This signal is the single biggest evidence gap in this analysis and should be filled by pulling the three recordings at https://assignmentcenter.uspto.gov/.

4. Cascading transfers — PARTIAL / UNCLEAR. Four recorded links over ~7 years (2006, 2012, 2013), i.e., not the <24-month burst that defines a classic cascade. The 2012 corrective → 2013 merger pair does fall within 24 months, but the 2012 event is a name correction with no beneficial change, so it likely overstates continuity. Treat as a weak/sub-threshold signal.

5. Pre-litigation transfer — PRESENT. The Hoshiko→IV merger was executed 2013-05-23; the IV district-court filings in this patent's family (W.D. Pa. 2:13-cv-00740, filed 2013; and the 2014 W.D. Pa. cases 1:14-cv-00220, 2:14-cv-01130/01131/00832) follow within roughly 6–12 months. The record is consistent with a chain arranged to place clean title in the asserting entity ahead of the campaign — though note the triggers preceded the formal merger (IV filed as Hoshiko's successor).

6. Bankruptcy fire-sale — NOT PRESENT. No bankruptcy docket, no §363 sale, no SEC filing evidencing a distressed sale anywhere in the chain.

7. Privateering — UNCLEAR. There is no SEC filing showing an operating company funding IV's assertion against competitors here. Ideaflood was itself the originator-and-assertion entity, not an operating company privateering out its patents. Do not over-read this.

8. Defensive aggregator — NOT PRESENT. The chain terminates at Intellectual Ventures I LLC, the opposite of RPX / AST / LOT / OIN neutralization.

Contextual dampeners (not signals, but material to valuation): (i) all claims were held patent-ineligible under §101 and the affirmance is reported (nonprecedential) in Intellectual Ventures I LLC v. Erie Indemnity Co., appeal from W.D. Pa. 1:14-cv-00220; (ii) IPR2016-01433 (Symantec et al.) reached a Final Written Decision; (iii) the patent is expired (2024-02-11). The asset is effectively spent.

Verdict

NPE — high confidence.

The recorded chain runs Ideaflood, Inc. → Hoshiko, LLC (Reel 018498/0337, executed 2006-07-21) → Intellectual Ventures I LLC (Reel 030639/0289, executed 2013-05-23, by merger) — a zero-product predecessor, an assertion-only intermediate, and a named NPE as current owner. Two strong signals (shell/assertion-only transfer and a known asserter in the chain) plus a pre-litigation timing match drive the call. The evidence gap is Signal 3: I could not obtain the correspondent-of-record for the three recordings from a primary source, so the "same lawyer across the chain" test is unmet and should be verified directly.

Verify at:

• USPTO Assignment Search: https://assignment.uspto.gov/patent/index.html (search 7757298, then pull Reels 018498/0337, 029006/0972, 030639/0289)
• USPTO Assignment Center: https://assignmentcenter.uspto.gov/
• PTAB: https://portal.unifiedpatents.com/ptab/case/IPR2016-01433 and https://portal.unifiedpatents.com/ptab/case/CBM2014-00032

I'll research this patent and its cited prior art. Let me start with several searches.

I have strong material on the two marquee references (Kinetech and RIAA-Bersson). Let me gather specifics on the remaining cited references.

I hit the tool-call budget, so this analysis is based on the patent record I retrieved plus full/partial text for the marquee references. Where I could not pull a reference's own text, I say so explicitly rather than guessing.

Prior-Art Analysis — US 7,757,298 B2

Note on target: I searched and confirmed only the record for US 7,757,298 B2 ("Method and apparatus for identifying and characterizing errant electronic files," app. 11/145,125, Shuster). I ignored numeric collisions (e.g., a stray "US 7757298 A 19981013" that appears in an EPO search report for an unrelated biotech case, and unrelated "7757298" records in real-estate/FEC data). Everything below is keyed to the '298 patent.

A. Legal frame for the § 102 analysis

Because the '298 patent is a continuation carrying the 1999/2000 priority chain, a reference must have an effective prior-art date before ~Apr. 1999 (for § 102(a)/(b)) or a § 102(e) date (its own U.S. filing date) before the applicant's invention date. This is the single most important filtering rule for the list below, and three of the examiner-cited references postdate the priority date and therefore cannot be § 102 prior art to the '298 claims (Section D).

Also critical: independent claims 1, 10, and 16 are written in the disjunctive — selection must be "according to at least one of" three screening criteria:

• (a) aggregate size of plural identically-sized files exceeds a threshold;
• (b) file content does not match the type indicated by the file name; or
• (c) data present beyond an end-of-data marker.

Plus, in every independent claim: generate an identification value representative of content → compare to identification values of unauthorized files → characterize as unauthorized.

So a reference anticipates claim 1/10/16 only if it discloses one of the three criteria AND the content-representative identification value AND the comparison/characterization. Anticipation by any single cited reference is therefore difficult; most of these references are directed to individual limitations and are best characterized as § 103 material (or § 102 art against narrower/dependent claims). I flag confidence accordingly.

B. The complete cited-reference set (from the '298 front page)

U.S. patents/ publications cited by the examiner (issue dates per the '298 face and uspto.report):

US 4,864,616 · US 5,519,865 · US 5,530,757 · US 5,809,138 · US 5,832,208 · US 5,835,722 · US 5,905,800 · US 5,978,791 · US 5,983,351 · US 5,996,113 · US 6,081,897 · US 6,182,081 · US 6,209,097 · US 6,236,768 · US 6,289,341 · US 6,510,513 · US 6,530,022 · US 6,577,920 · US 6,643,696 · US 6,922,781 · US 7,120,274 · US 2002/0087885 · US 2005/0108248

Foreign/other: WO 98/25373; WO 98/42098; Kalker et al., "Music2Share — Copyright-Compliant Music Sharing in P2P Systems," IEEE, June 2004.

C. Most relevant prior art — tiered analysis

TIER 1 — Broadly material to the core "identification value" concept

1. US 5,978,791 A — Farber & Lachman (Kinetech, Inc.)

• Full citation: U.S. Patent 5,978,791, "Data processing system using substantially unique identifiers to identify data items, whereby identical data items have the same identifiers," filed Oct. 24, 1997 (continuation of Ser. 08/425,160, filed Apr. 11, 1995); issued Nov. 2, 1999; assignee Kinetech, Inc.
• Description (verified from full text): Discloses computing a "True Name" for each data item — a substantially unique identifier "depending on all of the data in the data item and only on the data in the data item" (content-based hash, e.g., MD5/SHA). Also discloses determining whether a data item is present by examining a set of True Names, and — directly on point — a "Track for Licensing Purposes" mechanism: record the True Names of licensed files and "compare the contents of each user processor against the license table… If the user processor is found to have a file that it is not authorized to have, record the user processor and True Name in a license violation table." It further notes True Names can be used "for security purposes, for instance, to check for viruses."
• § 102 mapping:
  • Claim 1/10/16 — "generating an identification value… representative of at least a portion of the content" and "comparing… to identification values associated with unauthorized files" / "characterizing… as unauthorized": strongly disclosed (True Name = content-dependent identifier; license-violation comparison = characterizing an unauthorized file).
  • Claim 3 ("generating an identification value comprises generating a checksum") and claim 6 ("processing a plurality of known unauthorized files to generate the plurality of identification values"): arguably disclosed (message-digest "True Names"; license table built from known licensed items).
  • Weakness: Kinetech does not disclose the three selection criteria (a)/(b)/(c) of claim 1. Under the claim's "at least one of" language it is still missing the required selecting step, so I would not call this a clean § 102 anticipation of claim 1/10/16 — but it is the single most relevant piece of art and a strong § 103 anchor for the identification/comparison limitations.
  • Prior-art date: § 102(e) date = its 1997 filing (with 1995 parent); also printed publication Nov. 2, 1999. Qualifies as prior art.

2. US 6,081,897 A — Bersson (Recording Industry Association of America)

• Full citation: U.S. Patent 6,081,897, "Apparatus for monitoring and preventing unauthorized copying of digital data," filed Jan. 13, 1998 (provisional 60/035,086 filed Jan. 13, 1997); issued June 27, 2000; assignee Recording Industry of America.
• Description (verified): A recording system reads a source CD; software builds a "table of tracks" and, for each track, determines whether a copyright notice flag is present in a control field; before issuing a read command it consults the table and inhibits reading/recording of any track bearing the copyright notice. Intercepts read commands via "hook" routines.
• § 102 mapping:
  • Relevant to the '298 specification's copyright-notice content check (Fig. 2B, step 222) and to the "characterizing/blocking unauthorized files" concept and claim 9 ("deleting/marking") and claim 7 (presenting for review).
  • Not an anticipation of claim 1/10/16: its "trigger" is a copyright flag, not one of the three claimed selection criteria, and it does not generate a content-representative identification value or compare against a catalog of unauthorized-file identifiers. Best treated as § 102(a)/(e) context art and § 103 support.
  • Authoritative record: https://patents.google.com/patent/US6081897

3. US 5,996,113 A — Korn et al. (Intel Corporation)

• Full citation: U.S. Patent 5,996,113, "Method and apparatus for generating digital checksum signatures for alteration detection and version confirmation," filed Nov. 26, 1996; issued Nov. 30, 1999; assignee Intel Corp.
• Description (verified from full text/abstract): Generates a multi-part digital checksum signature for a "collection of data" by performing distinct operations (e.g., summing odd/even bytes, mixing operations) to define first/second/third/fourth portions of the signature; used for alteration detection and version confirmation by comparing an "error detection signature" against an "expected signature."
• § 102 mapping:
  • Claim 3 ("wherein generating an identification value comprises generating a checksum") and the signature-generation concept underlying claims 1/10/16 — directly relevant.
  • Its multi-operation signature generation is not the same as the '298's two-checksum-over-two-different-length-portions of a file (claims 4/5), so it does not anticipate claims 4/5.
  • Does not disclose unauthorized-file comparison or the selection criteria → not a stand-alone anticipation of the independents.

4. US 6,289,341 B1 — Barney

• Full citation: U.S. Patent 6,289,341, "Intelligent agent for identifying intellectual property infringement issues in computer network sites and method of operation thereof," filed June 26, 1998; issued Sept. 11, 2001.
• Description: Per its title/abstract, an intelligent agent that traverses computer-network sites to identify intellectual-property-infringement issues — i.e., automated detection of unauthorized use of protected content on Web sites. This is squarely in the same problem space as the '298 patent (crawling sites, detecting unauthorized material).
• § 102 mapping (with caveat): Potentially relevant to claim 1's "comparing… to identification values associated with unauthorized files" and to the specification's Web-site scanning (Fig. 2A). Caveat: I did not retrieve this reference's full claim text; its precise disclosure of a content-representative identification value and of any of the three selection criteria is unverified. Treat as strong § 103 art unless the full text confirms the identification-value/selection limitations.
• Prior-art date: filed June 26, 1998 (before the 1999 priority) → available.

5. US 6,577,920 B1 — Hyppönen et al.

• Full citation: U.S. Patent 6,577,920, "Computer virus screening," filed Oct. 2, 1998; issued June 10, 2003.
• Description: Virus-screening arrangement (anti-virus scan) — comparison of files against a database of signatures of known-malicious ("unauthorized") objects.
• § 102 mapping: Directly relevant to the generic architecture of "generate an identification value → compare against a store of identification values associated with unauthorized files → characterize." Virus screening is the closest analog to "known-bad" fingerprint matching. Caveat: I could not pull full text; the three selection criteria of claim 1 are almost certainly absent, so it is § 103 material for the identification/comparison limitations rather than a clean anticipation.
• Prior-art date: filed Oct. 2, 1998 → available.

TIER 2 — Material to discrete limitations (mostly § 103)

D. Cited references that POSTDATE the priority date — NOT § 102 prior art to the '298 claims

These were cited by the examiner, but their effective dates fall after the ~Apr. 30, 1999 priority date, so they cannot anticipate (and are of limited value under § 103 as of the '298 invention date):

Flag: The appearance of US 7,120,274, US 2002/0087885, US 2005/0108248 and the Kalker 2004 paper on the '298 face is procedural (IDS/examiner citations). It does not convert them into anticipatory art. Any analysis that treats them as § 102 references would be incorrect.

E. Bottom line — "most relevant" prior art and § 102 assessment

1. Most relevant single reference: US 5,978,791 (Farber/Kinetech). It is the closest art to the content-based "identification value" and "compare-against-a-catalog — characterize as unauthorized" spine of claims 1, 3, 6, 10, 16, and its § 102(e) date (1995/1997) comfortably predates the '298 priority. Its gap is the selection step (the three § 1 criteria), which it does not disclose.

2. Second most relevant: US 6,081,897 (Bersson/RIAA) for the "detect-an-embedded-notice-and-block-the-unauthorized-file" concept (mirrors the '298 copyright-notice embodiment), and US 5,996,113 (Korn/Intel) for the checksum/identification-value generation common to claims 3/4/5. Both qualify as prior art but cover only part of the independent claims.

3. No cited reference, on the text I could verify, discloses the full combination required by claim 1/10/16 (one of the three selection criteria + content-representative identification value + comparison to unauthorized-file identifiers + characterization). On this record, the cited art is stronger as a § 103 obviousness showing — which is consistent with the actual outcome: the claims were ultimately held invalid under § 101 (Fed. Cir., Intellectual Ventures I LLC v. Erie Indemnity Co., 2017, affirming W.D. Pa.), so the § 102 question was never the dispositive one. (Note: US 6,922,781, from the same family, was asserted in the PNC cases; the CBM2014-00032 institution denial confirms claims 1–3, 6–11, 13, 16 were asserted.)

F. Uncertainty / gaps (stated explicitly)

• Full text not retrieved for: US 6,289,341, US 6,530,022, US 6,577,920, US 6,209,097, US 6,510,513, and the two WO references. Their descriptions above are drawn from titles/abstracts and the '298 face, not verified claim language; the § 102 mapping for those entries is therefore provisional.
• I fully verified the text of US 5,978,791, US 6,081,897, and US 5,996,113 (Google Patents / uspto.report / FreePatentsOnline).
• Dates for several references come from the '298 patent's own citation table and uspto.report; I did not independently confirm every issue date against USPTO PatentCenter (the official-source requirement is flagged where relevant).
• The "at least one of" disjunctive construction means a reference disclosing only one criterion could theoretically anticipate; I applied that reading consistently, and even under it, no verified reference closes all limitations.
• The PTAB outcome for IPR2016-01433 and the specific § 101 disposition are carried over from the prior section and not re-litigated here; the "PTAB INVALID" tag on third-party lists remains unverified for lack of a primary source.

I'll ground this analysis in the prior-art citations listed on the patent record, and verify a few key references before building the combinations.

I found the key adjudicated record — the IPR2016-01433 Final Written Decision. Let me identify the specific references used in those instituted grounds.

Obviousness Analysis Under 35 U.S.C. § 103 — US 7,757,298 B2

0. Governing framework, and a correction to the earlier section

Statute applied: pre-AIA 35 U.S.C. § 103(a). The application (11/145,125) is a 2005 continuation of Ser. No. 09/561,751 (filed Apr. 29, 2000), claiming priority to Apr. 30, 1999. The Board in IPR2016-01433 expressly framed its grounds "under 35 U.S.C. § 103(a)," so the pre-AIA framework governs regardless of which date is used.

Resolution of a gap flagged in the prior section. The earlier summary could not confirm the PTAB outcome for IPR2016-01433 and cautioned that "PTAB INVALID" was unverified. The Final Written Decision text is now retrieved and is dispositive on that point:

"we determine that Petitioner has shown by a preponderance of the evidence that claims 1‑4, 6‑14, and 16 of the '298 patent are unpatentable."
— Symantec Corp. v. Intellectual Ventures I LLC, IPR2016-01433, Final Written Decision (Jan. 5, 2018), https://www.docketalarm.com/cases/PTAB/IPR2016-01433/Inter_Partes_Review_of_U.S._Pat._7757298/docs/01-05-2018-Board/Termination_Decision_Document-25-Final_Written_Decision.pdf

Two refinements: (i) the §101 affirmance in Intellectual Ventures I LLC v. Erie Indemnity Co. (Fed. Cir., Nov. 1, 2017) is a separate basis of invalidity, not an alternative holding on §103; (ii) claims 5 and 15 were not instituted (institution covered 1‑4, 6‑14, 16). Analysis below therefore treats claims 5/15 as the only claims lacking an adjudicated §103 holding.

1. Level of ordinary skill in the art (POSITA)

A POSITA as of April 1999 would be a software/systems practitioner with a B.S. in computer science or electrical engineering plus roughly one to three years of experience with file systems, network servers, and malware/virus-signature scanning. This is a mature, highly predictable, well-catalogued field: checksums, CRC-32, hash functions, file headers/"magic numbers," and signature-database scanning were all standard tools. No claim recites an algorithm, hardware, or data structure outside this baseline.

2. The decisive combination: adjudicated grounds in IPR2016-01433

The Board instituted six §103 grounds, all of which it sustained:

Verification caveat: the FWD text I retrieved names these six references and states the grounds, but does not reproduce their bibliographic data. I have not independently confirmed the patent/publication numbers behind "De Souza," "Hoffman," "Martins," "Farber," "Hyppönen," "Johnson," or "Nachenberg," and I will not guess them. What is confirmed is the Board's legal conclusion: a two-reference combination (De Souza + Hoffman, or Hyppönen + Johnson) teaches every limitation of claims 1, 3, 6‑10, 12, 13, and 16, and single-reference additions (Martins, Farber, Nachenberg) supply the dependents.

Practical significance. Because claim 1 was treated as representative and was cancelled, the entire independent-claim triad (1, 10, 16) falls together. Only claims 5 and 15 — the "second checksum on a larger portion that includes the first portion" limitations — were never reached.

3. Combinations drawn from the Prior Art section of this page

The Google Patents record lists 25 examiner/third-party citations, 15 family citations, and 45 forward citations. The following combinations are built from those references, each of which is mapped to claim elements. Date check first: references bearing a post‑April‑30‑1999 priority (e.g., WO 2002088943 A1 (Quinn, 2001/02), US 7,848,501 (Microsoft), US 7,120,274 (Shutterfly), US 2007/0056035, US 2007/0152854, US 7,673,342, US 7,473,431, US 2002/0087885, GB 2 357 599) are not available as prior art against claims entitled to the 1999 priority date. GB 2 357 599 in particular is tempting (it addresses "parasitic usage of web page embedded files," directly on point for claim 1's non-referenced-file criterion) but its priority is Dec. 23, 1999 — after the '298 date. It matters only if the 1999 priority is lost.

3.1 Combination X — Content-derived identifiers against a known-bad library (claims 1, 3, 6, 9, 10, 13, 16)

Motivation to combine. Kinetech's own rationale — identity that is "independent of its name, origin, location, address" — solves the exact impediment the '298 specification admits ("the file name is often changed"). Virus scanners already maintained signature databases and already matched file content against them. Combining a content-derived identifier with a signature library is the predictable union of two known techniques addressing the same problem (finding known-bad content regardless of naming), with a well-understood, deterministic expectation of success.

3.2 Combination Y — The three disjunctive selection criteria (claim 1 preamble; claims 10, 12, 16)

Motivation to combine. Each criterion is a routine heuristic for a documented abuse pattern, and the specification concedes each is a heuristic screening step ("suspect files are ones that are suspected of being improper, and are marked for further testing"). KSR permits combining "known elements" where the combination "yields … predictable" results and where there is "a design need or market pressure" — here, web hosts facing criminal/copyright exposure. Screening-then-fingerprinting is exactly the kind of "improvement in one field of endeavor" (storage administration) that flows from ordinary engineering judgment.

3.3 Combination Z — Network-facing agent + copyright/illicit-content indicia (claims 1, 6, 8)

• US 6,289,341 (Lucent): "intelligent agent" traversing web sites, comparing site data to "IP indicia," and producing "a list of suspected infringements" for "subsequently … manual investigation." https://uspto.report/patent/grant/[6289341](/patent/6289341)
• US 6,081,897 (Recording Industry Ass'n of America): "apparatus for monitoring and preventing unauthorized copying of digital data" — the precise problem statement of the '298 Background.
• US 6,232,768 (MIT): automated, context-dependent retrieval of information.
• WO 1998025373 A2 / US 5,983,351 (Intellectual Protocols) and WO 1998042098 A1 (Cryptoworks) — web-site copy protection and digital product rights management.
• US 6,510,513 (Microsoft) and US 6,530,022 (IBM, permission-based scanning of a web site) — server-side policy enforcement over stored content.

Motivation. Lucent's agent supplies the architecture (server-side automated scanning → flagged list → human review); RIAA supplies the objective (block unauthorized copies); Kinetech/Intel supply the identification mechanism. All are in the same field (network content monitoring) and address the same need; a POSITA would combine them with a reasonable expectation of success because each is a general-purpose computing component performing its ordinary function.

3.4 Human review before disposal (claim 7)

US 6,182,081 (interactive review of data contents), US 6,289,341 (Lucent: favorable comparisons "should subsequently be manually investigated"), and US 5,848,418 (file analyzer/selector) each disclose review-then-act workflows, motivating the claim 7 limitation.

3.5 Two-stage checksumting (claims 4, 5, 14, 15) — the only non-adjudicated claims

• US 4,864,616 (Micronyx, cryptographic labeling of stored data), US 5,530,757 (IBM, distributed fingerprints), and US 5,996,113 (Intel, checksum signatures) establish partial/progressive signature generation.
• US 5,890,836 (NetMind, CRC signatures for change detection) establishes CRC over a portion of a document as an efficient pre-screen.
• In the IPR, Farber supplied claims 4 and 14 over both primary combinations — i.e., the Board found the "two checksums over two portions" limitation present in the art.

Motivation for claims 5/15 specifically: screening on a cheap prefix and confirming on a larger window that includes the prefix is the canonical hierarchical/progressive hashing design. The patent's own stated advantage — "the ability to disqualify a file that does not match the first checksum without the need to read the larger amount of data" — is nothing more than avoiding I/O, a classic recognized design tradeoff. A POSITA would view the nested window (first 1,024 bytes, then first 10,240 bytes) as an obvious optimization with predictable results.

4. Motivation-to-combine rationale (consolidated, per KSR)

1. Same field of endeavor. All references address server-storage administration, content screening, or malware/copyright detection — the '298 field.
2. Same problem. Each targets illicit/unwanted stored files on shared servers; the '298 Background concedes the problem and the four dominant file categories (music, video, software, graphics) were known.
3. Predictable combination of known elements. Content-derived identifiers + signature library + heuristic pre-screen are each conventional; KSR holds predictable combinations of known elements obvious.
4. Design need / market pressure. Free web hosts bore storage/bandwidth costs and liability risk; automated screening replaced "not economically feasible" manual review — a stated market pull.
5. Teaching/suggestion in the art. Kinetech teaches names are unreliable; virus-scanner art teaches signature-database matching; Lucent teaches automated web-scale scanning with human follow-up. Each expressly points toward the claimed arrangement.
6. Reasonable expectation of success. Checksums/hashes are deterministic; a matching identifier reliably denotes a duplicate file. Nothing in the art taught away.

Secondary considerations. I found no evidence in the record of unexpected results, licensing nexus, or industry praise tied to these limitations; the patent family's forward citations and the litigation history do not supply a nexus argument that would rebut the prima facie case.

5. Claim-by-claim disposition

6. Caveats and contradictions to note

• No contradiction found with the prior section; rather, the IPR record resolves the earlier "[PTAB] Claims Invalidated field is blank" uncertainty in favor of invalidation of claims 1‑4, 6‑14, and 16.
• Preclusive-effect asymmetry: IPR findings are on a preponderance standard and do not bind a district court (which requires clear and convincing evidence). Conversely, the Erie Indemnity §101 affirmance (Fed. Cir. 2017, nonprecedential, W.D. Pa. 1:14‑cv‑00220) already renders every claim ineligible, so the §103 question is, in practice, secondary.
• Earlier non-institutions: CBM2014‑00032 (PNC) — not instituted (procedural); IPR2014‑01516 (IBM) — not instituted on the merits (Aug. 24, 2015), as confirmed by the Fed. Cir. in Erie Indemnity.
• Priority-date exposure: if claims were ever re-dated to the June 3, 2005 continuation filing, the post‑1999 references become available — including WO 2002088943 A1 (Quinn's filter driver, "matching the file identifier against a list of criteria" and "comparing the file signature to each entry on a list of signature criteria") and GB 2 357 599 (IBM, parasitic use of embedded files). That would only strengthen the obviousness case.
• Unverified bibliographic data: I could not retrieve the full identification (numbers, dates, assignees) of De Souza, Hoffman, Martins, Farber, Hyppönen, Johnson, or Nachenberg from the FWD excerpt. I state the Board's grounds as reported and flag that the underlying reference details are unconfirmed rather than reconstructing them.
• Transcription quirk: the Fed. Cir. opinion labels claim 1's third criterion "naming convention" while quoting "whether the file comprises data beyond an end of data marker." That is a labeling slip in the opinion, not a claim construction; the criterion is trailing-data detection.

Bottom line. Claims 1–4, 6–14, and 16 of US 7,757,298 have been held unpatentable under §103(a) in a Final Written Decision, and the same result is independently supported by combinations of the references cited on this patent's face (principally US 5,978,791, US 5,996,113, US 5,530,757, US 5,515,865, US 6,289,341, and the virus-signature family US 5,832,208 / US 5,889,943 / US 5,951,698 / US 6,577,920), each joined by a motivation grounded in the shared problem of policing stored content on network servers. Claims 5 and 15, though never instituted, would likewise have been obvious as routine progressive-hashing design choices.