US 6161179

I'll search for the specific patent number and check for any CAFC 2026 docket activity.

Let me run a couple more targeted checks on litigation/docket activity before summarizing.

US Patent 6,161,179 — Analyst Summary

Sources consulted: Google Patents (authoritative full text provided), USPTO.report grant page, FreePatentsOnline, Justia (assignee listing), EPO Global Patent Index, plus targeted searches of Federal Circuit 2026 decisions/dockets.

Literal-number caution: My searches for "6161179" also returned a different, unrelated document — Japanese Patent No. 6161179 (特許第6161179号), a Sankyo R&D pachinko gaming machine. That is a distinct national patent in a different jurisdiction and is not the subject of this report. No auto-correction has been applied.

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Bibliographic Data (US 6,161,179)

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Abstract (verbatim)

"To protect access to information recorded on a light-readable disc, a light-readable disc player provides the user with a unique key each time the user attempts to play the disc. After the user communicates the unique key to a transaction service and satisfies certain preconditions, such as providing payment or account information, the transaction service provides the user with an unlock key. The user communicates the unlock key to the light-readable disc player, which plays the disc only if the user has provided the correct unlock key."

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Plain-Language Overview of Each Independent Claim

Claim 1 — Method (core "challenge–response unlock" method).
A method of protecting access to disc content in which:

1. the disc player generates a first random number every time the user tries to access the content;
2. the user communicates qualifying information (e.g., payment/account info) plus that first random number to a transaction service, and the service generates a second random number only if the qualifying information satisfies predetermined criteria, the second number bearing a predetermined relationship to the first;
3. the second number is communicated back to the player; and
4. the player verifies the predetermined relationship and plays the content only if the relationship holds.
   In short: a per-play random challenge is issued by the player, a paid-for (or account-authorized) response is supplied by an external service, and the player itself checks the math before unlocking playback.

Claim 3 — Method with disc-identifying information (per-disc synchronization).
Same overall flow as claim 1, but the disc carries disc-identifying information (e.g., a serial number). The user supplies the qualifying information, the disc-identifying information, and the first random number to the transaction service. The first predetermined relationship (between the two random numbers) itself has a second predetermined relationship to the disc-identifying information — i.e., the governing relationship is effectively keyed to the specific disc, so the service must know which disc is in play to compute the right answer.

Claim 5 — Method with per-random-number synchronization.
Again the same overall flow, but here the first predetermined relationship (between the first and second random numbers) itself has a second predetermined relationship to the first random number. Practically, this covers selecting among multiple governing relationships based on the value of the player-generated challenge, so the relationship used can vary with each challenge value.

Claim 7 — Light-readable disc (article of manufacture).
A disc carrying first and second program information, where the first program information causes the player to:

• generate a first random number;
• display it to the user;
• prompt the user for a second number;
• generate an unlock number having a predetermined relationship to the first random number; and
• compare the user's second number to the unlock number, retrieving the second program information only if they match.
  This is the disc-side (product) claim covering the "lock program" recorded on the medium itself, independent of the external transaction service.

Dependent claims 2, 4, 6 add that the player has a random-number function that generates the first random number (leveraging the DVD-Video Specification's required random-number generator). Dependent claims 8–11 narrow the medium to a DVD disc (8), a DVD-Video disc (9), a DVD-ROM disc (10), or a CD-ROM disc (11).

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CAFC 2026 Docket Check

• No Federal Circuit 2026 docket, opinion, or appeal involving US 6,161,179 was found in my searches of 2026 Federal Circuit decision summaries and docket references. The 2026 Federal Circuit materials surfaced (e.g., Constellation Designs v. LG, Teva v. Lilly, Ironburg v. Valve, Ollnova v. ecobee, AGI SureTrack v. Farmers Edge) concern unrelated patents.
• No active litigation or PTAB proceeding tied to this patent number appeared in the accessible sources.
• Confidence caveat: I do not have direct API access to PACER, the CAFC docket system, or USPTO's Patent Trial & Appeal Case Tracking System in this session. My litigation check relies on general web results, which are not an exhaustive docket search. I therefore cannot state with certainty that no 2026 appeal exists — only that none was found. Given the patent's status (Expired – Lifetime, anticipated expiration 2018-03-04), any 2026 appellate activity would most plausibly relate to past (pre-2018) infringement damages rather than injunctive relief.

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Note on Sources

The full patent text was supplied authoritatively via Google Patents and is corroborated by USPTO.report, FreePatentsOnline, and Justia assignee records. I did not find a material conflict between the supplied text and the live search results; where the search added information (family members, forward citations including Warner Bros. and Zoo Digital), I have flagged it as search-derived rather than from the granted text itself.

I'll search for litigation involving US patent 6161179.

Let me search patent litigation databases specifically.

Let me search the litigation portal and other patent litigation databases more directly.

Summary of Findings

I could not identify any litigation involving U.S. Patent No. 6,161,179. My searches across patent‑litigation‑oriented sources did not return a single district court case, CAFC appeal, ITC investigation, or PTAB proceeding naming this patent as an asserted or challenged patent.

What I searched

• General litigation queries for the patent number (US 6161179, 6,161,179, "6161179 litigation," "6161179 defendant complaint")
• The assignee/inventor combination (WEA Manufacturing Inc.; Robert T. Seidel)
• Attempts to reach the Unified Patents litigation portal and PACER/Docket‑Alarm‑style sources

The only direct return for the patent itself was its Google Patents/FreePatentsOnline record — i.e., the specification and prosecution history, not any case document.

Important caveat on false positives

One search prominently returned a document about Japanese Patent No. 6161179 (特許第6161179号) — a Sankyo R&D pachinko/gaming machine patent. That is a completely different, unrelated patent sharing the same digits. It is not U.S. Patent 6,161,179, and I have excluded it. Note also that the number "6161179" appearing in unrelated corporate filings (e.g., dollar amounts, docket strings) should likewise not be mistaken for the patent.

What the record does show (non‑litigation context)

• Patent: "Key-based protection method for light-readable discs," inventor Robert T. Seidel, assignee WEA Manufacturing, Inc., filed 1998‑03‑04, granted 2000‑12‑12, priority to provisional 60/058,074 (1997‑09‑05).
• Legal status: Expired – Lifetime; anticipated expiration 2018‑03‑04. This matters practically: even if a case once existed, it would have had to conclude before the patent's term ran out in 2018.
• Family: Corresponding foreign members include EP 0901123 (B1), DE 69815970 (T2), JP H11149710, KR 100611569, AU 753438, SG 72854, HK 1018842. Any enforcement more likely occurred on the European/Japanese/Australian side, but I found no such suits either.
• The "Cited By" entries (e.g., Warner Bros. "Random selection program for an optical disc," Zoo Digital "Unlocking an audiovisual product," Clwt media protection) are later patents that cite this one as prior art — they are not litigation and should not be reported as such.

Recommendation / verification steps

Because I cannot confirm a negative with certainty from the sources reached, I would verify against these specialized databases before treating "no litigation" as final:

1. Unified Patents litigation portal – https://portal.unifiedpatents.com/litigation (search the patent number in the "Patents" view).
2. RPX Insight / Docket Navigator / Lex Machina – search 6,161,179 for both district court and PTAB/IPR/PGR records.
3. PACER (nationwide docket search) and CAFC docket search for any appeal referencing the patent.
4. USPTO Patent Center / PTAB – confirm there is no post‑grant review involving the patent.

Bottom line: Based on available search results, no known litigation is associated with U.S. Patent No. 6,161,179. If you need this stated as a certified litigation clearance, please have me run the four paywalled/portal sources above, since those provide authoritative coverage that open web search does not reproduce.

I'll verify the "no PTAB activity" default against public sources before reporting.

Let me run a few more targeted checks before finalizing.

Proceedings overview

Total AIA trial proceedings on file: 0. The structured "PTAB proceedings on file" block (USPTO ODP canonical list) returns no IPR, PGR, or CBM proceeding for US 6,161,179; my independent checks of Google Patents' patent page, uspto.report, and general PTAB-decision searches surfaced no petition, institution decision, Final Written Decision, or appeal naming this patent — so the breakdown is 0 active / 0 claims invalidated / 0 claims sustained / 0 settled / 0 institution-denied. The defensive posture this gives a defendant is neutral-to-mixed, not hardened: all 11 claims are untested at the PTAB, meaning you have no free "claim 1 is cancelled" argument — but you also face a patent that (a) expired on 2018-03-04, (b) was never, as far as public records show, backed by litigation or an IPR, and (c) is easily attacked on § 103 with a 1997 priority date and a thin specification.

Proceedings

None. No AIA trial proceeding was instituted or even publicly docketed against US 6,161,179, so there is no proceeding number, panel, institution decision, FWD, settlement, or Federal Circuit appeal to report. Per the constraints of this task, I am not inventing one.

Two adjacent items that are not PTAB proceedings and should not be confused with them:

• T 0591/05 (WEA Manufacturing Inc.) — a 2006 EPO Board of Appeal decision (appeal rejected as inadmissible). This concerns a different WEA application (EP app. 97307911.4, "Optical disc inspection equalization system and method"), not the EP counterpart of '179 (EP0901123B1). No EPO opposition to EP0901123B1 surfaced in my searches either.
• Zoo Digital / Zootech "Unlocking an audiovisual product" family — GB/JP/US applications that cite '179 only as background prior art. These are third-party citations, not challenges. They are, however, evidentiary: they confirm that '179's disclosure-teaching (player generates unique key → transaction service returns unlock key → player verifies predetermined relationship) was publicly characterized as known art by 2003-2005. That is usable § 102/103 material against other patents, and useful context if you ever need to argue the '179 disclosure is thin.

Note on records confidence: the ODP block is the canonical source and reports zero. I could not directly query PTAB E2E or Docket Alarm in this session, so I cannot affirmatively rule out a pre-institution petition that was denied and never indexed by the sources I could reach. I found no such record, but that is a "not found," not a certified negative.

Strategic summary

Claim status: all 11 claims are UNTESTED. Claims 1–6 are the method claims (key generation → transmit qualifying info + random number to transaction service → receive second random number with a "predetermined relationship" → player verifies and plays only on match). Claim 3 adds a "disc-identifying information" (UNIQUE CODE) linkage and claim 5 adds a first-relationship/second-relationship-on-the-random-number variant — these are the FIG. 4A/4B and FIG. 5A/5B embodiments. Claims 7–11 are the light-readable disc claims, with 8–11 depending to DVD / DVD-Video / DVD-ROM / CD-ROM. Nothing is cancelled, nothing is confirmed patentable by the Board. Critically, the patent is expired ("Expired - Lifetime," anticipated expiration 2018-03-04), which limits past-damages runway under 35 U.S.C. § 286 to six years back from filing — i.e., to conduct on or before roughly 2020 — and makes any current assertion a backwards-looking damages claim at best.

Estoppel landscape: there is none. Section 315(e)(2) estoppel only arises from a petitioner that reaches a Final Written Decision; with no IPR there is no estoppel, and correspondingly no prior-art ground has been burned by anyone. For a defendant today, the entire field is open: printed publications, patents, and public-use/system art predating the 1997-09-05 priority date. The most attractive attack is § 103 over the pre-1997 pay-per-view / software-registration / remote-unlock literature that the '179 specification itself acknowledges — the examiner's cited references (e.g., US 5,337,357 Software distribution protection; WO 94/07204 System for software registration (Uniloc); US 5,400,403 (RSA Data Security); US 5,754,649 (Macrovision); US 5,784,460 (Protocall)) — combined with a DVD player random-number-generator admission. Note that the claim language is broad and functional ("predetermined relationship," "governing relationship"), which cuts both ways: broad claims are easy to read on a defendant, but also easy to anticipate/obvious. The § 112 written-description attack is also live, since the specification discloses only a trivial linear equation (UNLOCK KEY = UNIQUE KEY + 7803) as the enabling example for the entire "GOVERNING RELATIONSHIP" genus.

Pattern signals: absent. No repeat-petitioner pattern (no petitioner at all), no patent-owner PTAB-appeal pattern, no defensive-aggregator footprint (no Unified Patents, RPX, or similar IPR appears in the record or in searches). The patent owner, WEA Manufacturing, Inc. (Olyphant, PA), no longer exists under that name — it was sold to Cinram International in October 2003 and later folded into Technicolor. That is a significant practical signal: there is no obvious operating-company or NPE owner with a demonstrated appetite for PTAB fights, which is consistent with the total absence of IPRs on a 1998 patent with a 20-year life. The flip side of the doctrinal rule — "well-asserted patents eventually attract IPRs" — is that this patent was apparently never well-asserted, so the absence of PTAB activity here is a signal of low assertion pressure, not of institutional strength.

Recommended next steps

1. Do not plan around a cancelled claim. Nothing at the PTAB helps you. If you received a demand letter citing claims 1, 3, 5, or 7, you cannot say "that claim is dead." Your invalidity fight, if any, is a district-court or ex parte reexamination fight.
2. Lead with the § 286 / expiration timeline. The patent expired 2018-03-04 with all maintenance fees paid (4th/8th/12th year fees paid through the 2012-05-16 payment). Quantify the surviving damages window (six years back from any complaint) before spending on merits. In many scenarios the recoverable period is already closed.
3. Preserve the strongest invalidity theory now. Commission a § 103 chart pairing the pre-1997 software-registration / pay-per-use references cited on the face of '179 with a DVD-player random-number-generator disclosure, and separately develop the § 112 enablement/written-description theory against the "GOVERNING RELATIONSHIP" genus (spec. supports essentially one linear equation). Because no IPR has been filed, a defensive ex parte reexamination under 35 U.S.C. § 302 remains fully available to you — no § 315(b) one-year bar, no § 315(e) estoppel — and is a low-cost way to put claims 1–11 at risk without a PTAB trial.
4. If you are nonetheless sued and want the PTAB route, note the mechanics: a § 315(b) one-year clock from service of the complaint, a § 311(b) limit to patents and printed publications only (system-art/public-use theories stay in district court), and the post-SAS all-or-nothing institution practice. But weigh this against the expired-patent posture — an IPR on a 2018-expired patent primarily buys you a validity ruling, not damages relief.
5. Verify the negative yourself before relying on it. Two records worth pulling directly, since I could not query them in this session: (i) PTAB E2E (https://ptacts.uspto.gov/ptacts/) search on application 09/034,884 and patent 6,161,179; and (ii) the patent's full file wrapper via USPTO Patent Center (https://patentcenter.uspto.gov/), plus a CourtListener docket sweep (https://www.courtlistener.com/) for any assertion of '179 that would explain why no IPR exists. If either surfaces a proceeding, the analysis above changes at the claim level and should be re-run.

Bottom line: no PTAB activity on file for US 6,161,179 — no institution decisions, no FWDs, no settlements, no CAFC appeals. All 11 claims are untested, no estoppel has attached to anyone, and the patent is expired. For a defendant, that combination means the patent is soft but not pre-killed: attack it on § 103/§ 112 and the damages clock, not on a PTAB record that does not exist.

I'll research the assignment record for US 6161179 from the primary sources and cross-reference.

Assignment & Ownership Reconstruction — US 6,161,179

Scope note / source limitation (read first): The record below is built from the patent's own Google Patents legal‑events table, the FreePatentsOnline and uspto.report grant records, and public corporate‑history sources for the assignee. I was not able to complete a live query of the USPTO Assignment Center (assignmentcenter.uspto.gov / assignment.uspto.gov) for this patent within the tool budget. Google Patents' legal‑events table typically reproduces recorded assignment reel/frame data, but it is not guaranteed complete for old records. Treat the "only one assignment" finding as strongly indicated but not certified; verification steps are given at the end.

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Inventors

Pattern notes: A single inventor assigning to the company that filed the application one month later is the classic employee‑invention / "hired‑to‑invent" pattern. There is no evidence of inventor departure, no multi‑inventor fragmentation, and no post‑filing inventor‑side re‑assignment. Nothing here resembles the "all inventors leave within 12 months, portfolio then sold" precursor. One caution: I could not independently confirm Seidel's title or dates of employment at WEA from a corporate source, so the employer link rests on the assignment instrument itself.

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Original assignee

WEA Manufacturing, Inc. — a Pennsylvania corporation, 1400 E. Lackawanna Ave., Olyphant, PA 18447. Named as original assignee on the face of the patent and in the only recorded assignment.

• Primary line of business: Physical media replication — vinyl, cassettes, 8‑tracks, VHS, and from September 1986 CDs, and from the mid‑1990s DVDs. Its DVD unit operated as Warner Advanced Media Operations ("WAMO"), then billed as the largest DVD manufacturing facility in the world. It was the manufacturing arm of Warner Communications → Time Warner → Warner Music Group.
• Did it ship a product embodying the claims? No evidence of it. WEA manufactured discs; the claims recite a disc-plus-player-plus-transaction-service pay‑per‑use method, and the specification frames the invention as an alternative to the DIVX pay‑per‑view format. WEA supplied replication capacity, not the claimed unlock/transaction infrastructure. The claims appear to read on a service-and-hardware combination WEA did not itself commercialize.
• Current status: No longer exists as an independent entity. Cinram International acquired WEA Manufacturing from Time Warner in October 2003 (~US$1.05 B, announced 2003‑07‑18, closed 2003‑10‑24), including the Olyphant plant. Cinram later sought bankruptcy protection in 2012; Technicolor acquired Cinram's North American operations in 2015; the Olyphant plant closed 2018 and was demolished in 2020.

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Assignment timeline

1998-02-18 (executed) / recorded 1998-03-04 — Reel 009035/0839

• Conveyance: Assignment (ASSIGNMENT OF ASSIGNOR'S INTEREST)
• Assignor: Seidel, Robert T.
• Assignee: WEA Manufacturing, Inc. (Pennsylvania)
• Correspondent: Not determinable from the sources reached. The Google Patents legal‑events entry exposes the reel/frame (009035/0839) and the assignor/assignee, but not the recording correspondent's name, firm, or address. I therefore cannot assess whether this correspondent recurs anywhere in a chain or on other tracked patents. This is a genuine gap, not a "no."
• Context: Initial inventor‑to‑employer assignment, executed two weeks before the 1998‑03‑04 filing of application 09/034,884 and reflecting the Feb 18, 1998 effective date recorded by the Assignment Division.

No further recorded assignments appear in the sources reached — no assignment to Cinram, to Time Warner, to Warner Music Group, to any IP‑holding subsidiary, and no security agreement, merger, change‑of‑name, or release. Maintenance fees were paid in 2004, 2008, and 2012 (4th, 8th, 12th years), and the patent is recorded as Expired – Lifetime with an anticipated expiration of 2018‑03‑04.

Interpretation: The corporate acquisitions that changed WEA Manufacturing's ownership (Time Warner → Cinram 2003; Cinram → Technicolor 2015) were asset/stock transactions that were apparently never recorded against this patent at the USPTO. So while the underlying business went Cinram → bankruptcy → Technicolor, the recorded chain terminates at WEA Manufacturing, Inc. If no post‑issuance assignment exists, the patent remained with WEA Manufacturing and passed by operation of the corporate acquisitions rather than by recorded instrument — meaning the recorded "owner of record" at expiry was still WEA Manufacturing, Inc.

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Timeline diagram

timeline
    title Ownership of US 6161179
    1997 : Provisional application filed by Seidel
    1998 : Executed assignment to WEA Manufacturing Inc
         : Non-provisional application filed
    2000 : Patent granted
    2003 : Cinram acquires WEA Manufacturing
         : Corporate deal not recorded against patent
    2008 : 8th year maintenance fee paid
    2012 : Cinram seeks bankruptcy protection
    2015 : Technicolor buys Cinram North America
    2018 : Patent term expires

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NPE / troll-pattern signals

1. Shell-entity transfer — NOT PRESENT. The only recorded conveyance is reel 009035/0839 (1998‑02‑18 / 1998‑03‑04), an inventor‑to‑operating‑company assignment to a Pennsylvania manufacturing corporation. No "IP / Patents / Licensing / Holdings / Ventures" transferee appears anywhere in the record.

2. Known asserter in the chain — NOT PRESENT. WEA Manufacturing, Inc. is a media‑replication operating company and appears on no public NPE roster (Acacia, Marathon, IV, IPNav, Wi‑LAN, Conversant, Vringo, Pendrell, Innovatio, MPHJ, Lumen View, Round Rock, etc.). Caution on false positives: the Google Patents "Cited By" list includes Warner Bros. Entertainment Inc. ("Random selection program for an optical disc," filed 2003‑05‑12) and Zoo Digital ("Unlocking an audiovisual product"). Those are later patents citing this one as prior art — they are not assignees or transferees of the '179 patent and must not be reported as such.

3. Repeat correspondent across the chain — UNCLEAR / NOT DETERMINABLE. With a single recorded assignment and no correspondent data exposed by the sources reached, recurrence cannot be tested. There is no evidentiary basis to call this signal either way, and I will not infer an NPE‑linked filer from the mere existence of one recording.

4. Cascading transfers — NOT PRESENT. One recorded link only; nothing resembling chained LLCs or serial re‑recordings within 24 months.

5. Pre‑litigation transfer — NOT PRESENT. Per the previously generated litigation summary, no infringement suit, PTAB proceeding, ITC investigation, or CAFC appeal involving US 6,161,179 was identified. There is no first‑suit date against which to measure a 6‑month transfer window, and the single assignment predates any conceivable suit by ~20 years.

6. Bankruptcy fire‑sale — NOT PRESENT (on the record), though the successor entity did fail. Cinram — which had absorbed WEA Manufacturing in 2003 — sought bankruptcy protection in 2012, and its North American operations were bought by Technicolor in 2015. However, no assignment of this patent appears in any bankruptcy sale, and the recorded chain shows no transfer to a purchaser or liquidating trust. The signal therefore does not attach to this patent on the evidence available; it is a corporate‑history fact about the successor, not a recorded disposal of the asset.

7. Privateering — NOT PRESENT. No operating‑company‑to‑NPE transfer, and no SEC‑filing or press evidence surfaced of WEA/Time Warner/Warner Music funding an assertion vehicle against competitors with this patent.

8. Defensive aggregator — NOT PRESENT. The chain does not terminate at RPX, AST, LOT, Unified Patents, or OIN. There is likewise no evidence the patent was neutralized into a defensive pool.

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Verdict

Insufficient data (no records beyond the original assignment).

The entire recorded chain is a single instrument: an inventor‑to‑employer assignment executed 1998‑02‑18 and recorded 1998‑03‑04 at Reel 009035/0839, conveying Robert T. Seidel's rights to WEA Manufacturing, Inc. No post‑issuance assignment, no licensing LLC, no asserter, and no litigation were found. Every NPE signal is either not present or, for the repeat‑correspondent test, not determinable because the correspondent of record was not exposed by the sources reached. The corporate successors (Cinram, then Technicolor) changed hands via business acquisitions that were not recorded against this patent, so the recorded owner of record remained WEA Manufacturing, Inc. through the patent's 2018‑03‑04 expiry — leaving no chain that could support an NPE characterization.

Verification links and steps:

• USPTO Assignment Center (search patent 6,161,179): https://assignmentcenter.uspto.gov/ and https://assignment.uspto.gov/patent/index.html — pull the reel 009035/0839 entry to capture the correspondent of record (the missing field above), then re‑run the name across other patents to test signal #3.
• USPTO Patent Center / PTAB: confirm no post‑grant reassignment or review.
• SEC EDGAR (Time Warner 2003 Form 8‑K/filings re: Cinram transaction; Cinram bankruptcy docket) — confirm whether the '179 patent was included in the 2003 asset sale or the 2012/2015 proceedings.
• RPX Insight / Unified Patents portal — confirm no asserter linkage.

Flag on the prior section: the previously generated Litigation summary reached "no known litigation" via open‑web search only. That conclusion is consistent with everything found here (a lone 1998 assignment, expiry in 2018), but it remains uncertified for the same reason — it did not reach the paywalled/NPE‑portal sources. Neither section should be quoted as a certified clearance without those runs.

I'll analyze the prior art cited against US 6,161,179. I already have the authoritative citation list from the patent text; let me verify details on the key references before building the § 102 analysis.

Now let me verify the remaining key references.

Prior-Art Analysis — US 6,161,179 ("Key-based protection method for light-readable discs")

Scope note (per your instruction): I searched on the literal number 6161179 / 6,161,179 only. As flagged in the prior sections, that query also surfaces an unrelated Japanese Patent No. 6161179 (Sankyo R&D pachinko machine) — I have excluded it and am not auto-correcting it into the US patent. All findings below are keyed to the U.S. patent whose authoritative text was supplied (Google Patents, US09/034,884).

Source of the prior-art set: The 17–18 references below are the references the Examiner actually cited on the face of US 6,161,179 (Google Patents "Citations" list; the count difference is EP 0636962A2, which appears in the 18-item set). This is not an independent novelty search — it is an analysis of the citations of record, and I flag where my substantive verification is thinner.

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The one limitation that controls everything

Every independent method claim (1, 3, 5) recites the step of "causing the light-readable disc player to generate a first random number each time the user attempts to access the information," and claim 7 requires the disc's program to cause the player to "generate a first random number" and then "generate an unlock number having a predetermined relationship to the first random number."

That is a player-side, per-access random challenge. Almost all of the cited art instead relies on a fixed identifier (a disc serial number, an embossed ID code, or user/hardware data) rather than a fresh player-generated random challenge. That distinction is why, as set out below, none of the cited references appears to anticipate any independent claim under § 102 standing alone — they are § 103 (obviousness) references, and the strongest combination is NCR + Uniloc + AT&T. I state this up front because the task frames the references as "anticipators," and the honest answer is that the record does not support clean § 102 anticipation.

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Evidence-backed deep dive on the closest references

1. Uniloc (Singapore) Private Limited — WO 94/07204 A1 — System for software registration

• Dates: priority 1992-09-21; PCT filed 1993-09-20; published 1994-03-31 (family: AU 48113/93; AU 678985 B2; later US 5,490,216).
• Description (verified): Software runs in demo mode; the user's computer transmits (i) user data, (ii) software data, and (iii) computer-hardware data to a remote registration server. The server generates a registration LUID / "security key" from that data and returns it; the user's computer independently generates a local LUID using the same algorithm and compares the two; on a match, the software flips from demo to full use.
• § 102 relevance: Claim 1/3/5 — no anticipation. The Uniloc system discloses the challenge answer path (remote service generates a key that the local machine verifies against its own independently computed value) but its "unique" value is derived from user/software/hardware data, not a player-generated random number produced anew each access. That missing element defeats anticipation.
• § 103 relevance: This is the single most structurally analogous reference in the set to the claimed player-verifies-service-key architecture.

2. NCR Corporation — US 4,652,698 A — Method and system for providing system security in a remote terminal environment

• Dates: filed 1984-08-13; published 1987-03-24.
• Description (verified): Remote terminals coupled to a central processor. The central processor generates a random number; using a prestored algorithm and terminal number, the processor computes a "fourth residue," while the terminal computes a "third residue" from the same random number/algorithm/terminal number; access is granted when the two residues correspond.
• § 102 relevance: Claims 1/3/5 — no anticipation (also independently ineligible because it discloses no light-readable disc). Notably, the random number is generated at the central processor, not at the player/terminal — the inverse of the claim's requirement.
• § 103 relevance: This reference supplies the exact "random-number challenge + matching computation" mechanism the claims rely on, and it is the reference most useful for attacking the "generate a first random number" element. If a single reference were to be characterized as "closest," it is the strongest on the random-number element; Uniloc is the strongest on the light-media/registration element.

3. AT&T Corp. — EP 0 653 695 A2 — Software pay per use system (family: US 5,625,690; filed via US 08/152,769)

• Dates: priority 1993-11-15; published 1995-05-17 (EP A3 2000-03-22).
• Description (verified): An encryption program encodes software; to use it, the user calls a telephone number to receive the cryptographic keys needed to decrypt the secured software, paying per use. The system explicitly contemplates freely distributable copies because payment is per use.
• § 102 relevance: Claims 1/3/5 — no anticipation (no light-readable disc; no player-generated random challenge).
• § 103 relevance: This is the reference that maps onto the "transaction service … if the qualifying information satisfies predetermined criteria" steps (telephone service, payment per use). It pairs naturally with NCR/Uniloc for a § 103 challenge.

4. Sony Corporation / Digital Audio Disc Corporation — US 5,513,169 A — CD-ROM with machine-readable I.D. code

• Dates: filed 1993-10-06; published 1996-04-30.
• Description (verified): A machine-readable serial number is formed on a CD-ROM by laser-removing reflective material; a software distribution system uses an access code based on the desired program and the CD's serial number to "unlock" the program. The specification expressly worries that a single code could unlock the same program on all discs sharing an ID.
• § 102 relevance: Claim 7 — arguably the closest single reference to the product claim. Claim 7 requires the first program information to cause the player to generate a random number, display it, prompt for a second number, generate an unlock number having a predetermined relationship to the first random number, and compare. US 5,513,169 uses a fixed disc serial number, not a player-generated random "unlock number," so it does not anticipate claim 7 either.
• § 103 relevance: Strong reference against claim 7 and dependent claims 8–11 (light-readable disc/DVD/CD-ROM limitation).

5. Other substantive § 103 references (verified at title/abstract level)

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§ 102 vs. § 103 — the bottom-line assessment

No cited reference, on its face, discloses every element of any independent claim, because each one is missing at least the "player generates a first random number each time the user attempts to access" element. Therefore, measured against the strict single-reference anticipation standard:

• Claims 1, 3, and 5: No clean § 102 anticipator among the cited art. Closest: NCR US 4,652,698 (random-number challenge/response, but generated at the central processor and no light-readable disc) and Uniloc WO 94/07204 (remote service generates a matching key that the local machine independently verifies, but from derived data, not a per-access random challenge).
• Claim 7: No clean § 102 anticipator. Closest disc-side references: Sony US 5,513,169 (disc serial number used to "unlock" software) and JVC US 5,379,433 (embossed ROM ID compared against stored code) — both use fixed identifiers, not a player-generated random "unlock number."
• Dependent claims 2, 4, 6 and 8–11 inherit the fate of their parents; the DVD/CD-ROM narrowings (8–11) are met point-blank by Sony US 5,513,169 and JVC US 5,379,433, but again only in combination with the missing random-challenge teaching.

The strongest § 103 combination: NCR US 4,652,698 (random-number challenge + matching computation) + Uniloc WO 94/07204 (remote registration service returns a key the local machine verifies) + AT&T EP 0 653 695 (telephone transaction service gating software use on payment), optionally with Sony US 5,513,169 for the light-readable-disc/CD-ROM medium element of claims 7–11.

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Confidence and limitations (stated explicitly, per operating rules)

• The citation list, titles, assignees, and filing/publication dates come from the authoritative patent text and are high confidence.
• The descriptions of Uniloc WO 94/07204, NCR US 4,652,698, AT&T EP 0 653 695, Sony US 5,513,169, and JVC US 5,379,433 are verified against their own documents/records (Google Patents, EPO GPI, USPTO-family records) and are high confidence.
• Descriptions for US 4,991,208, US 5,400,403, US 5,784,460, US 5,426,701, US 5,337,357, EP 0 636 962, EP 0 566 492, EP 0 574 219, EP 0 691 762, WO 88/02202, WO 95/35533, WO 96/08756 are based on the cited titles/assignees; I did not independently pull their full texts in this session, so those characterizations are medium/low confidence and flagged as such. My tool budget was exhausted before I could verify the remaining four references in your second batching request.
• Timing caution: US 5,754,649 (pub. 1998-05-19) and US 5,784,460 (pub. 1998-07-21) published after the 1997-09-05 priority date and so qualify as prior art only via pre-AIA § 102(e) (earlier U.S. filing dates of 1995-05-12 and 1996-10-10, respectively), not as § 102(a)/(b) printed publications.
• I do not have PACER/PTAB/CAFC API access in this session; nothing above should be read as a certified novelty or validity opinion. For a formal § 102/§ 103 clearance, the four remaining unverified references should be pulled and read in full.

I'll ground the § 103 analysis in the actual cited references before building the combination charts.

Now let me pull the remaining key references cited on the '179 face.

I hit the tool-call ceiling partway through reference retrieval, so the analysis below relies on (a) the authoritative full text you supplied, (b) the reference list and characterizations on the '179 face, and (c) the search-verified disclosures I did retrieve — chiefly US 5,337,357 (Software Security), WO 94/07204 / US 5,490,216 (Uniloc), US 5,513,169 (Sony/DADC), US 5,754,649 (Macrovision), and the description of WO 88/02202 (M/A-Com). Where I could not independently retrieve a reference's body, I say so and flag the mapping as title/admission-based rather than verified.

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§ 103 Obviousness Analysis — US 6,161,179

0. Cross-reference to prior sections

The earlier "Recommended next steps" section recommended "a § 103 chart pairing the pre-1997 software-registration / pay-per-use references cited on the face of '179 with a DVD-player random-number-generator disclosure." This section executes that chart. It does not repeat the claim summaries, PTAB posture, or litigation findings already generated. One correction to flag: the earlier sections list 17 citing references; the Google Patents page actually renders 17 in the "Citations" table and 18 in the "Patent Citations" table (EP 0636962 appears only in the latter). That is a rendering discrepancy in the source, not a substantive contradiction, but it matters for numbering a chart.

1. Governing legal framework

• Pre-AIA 35 U.S.C. § 103(a) applies (application filed 1998-03-04; priority 1997-09-05). All references on the face of '179 predate 1997 and therefore qualify as § 102(b) art as of the 1998-03-04 filing ($102(b) critical date = 1997-03-04). The prior-art status of the references does not depend on whether the claims get the provisional's 1997-09-05 benefit.
• Graham v. John Deere Co., 383 U.S. 1 (1966): scope/content of prior art; differences; PHOSITA level; secondary considerations.
• KSR Int'l Co. v. Teleflex Inc., 550 U.S. 398 (2007): the rationales now usable include (i) known elements combined by known methods to yield predictable results; (ii) simple substitution of one known element for another; (iii) use of a known technique to improve a similar device in the same way; (iv) applying a known technique to a known device ready for improvement; (v) "obvious to try" from a finite number of identified, predictable solutions; (vi) design incentives / market forces; (vii) express TSM.
• MPEP § 2143 rationales; In re Keller, 642 F.2d 413 (CCPA 1981) (test the combined teachings, not each reference in isolation); In re Merck, 800 F.2d 1091 (Fed. Cir. 1986) (same).
• PHOSITA (my construction): a degreed engineer or computer scientist with 3–5 years in consumer optical-media authoring and content-protection, familiar with the DVD-Video Specifications (which '179 incorporates by reference) and with telephone/network transaction-based software registration systems of the mid-1990s.

2. The scope of the claims, distilled to limitations

3. Reference element map

Caveat: the last eight entries marked "title only" are mapped on the strength of the titles as they appear on the '179 face plus '179's own characterizations. I was unable to retrieve their bodies within this session's tool budget. Any chart filed in a real proceeding must verify each one.

4. The primary § 103 combination — Claim 1

4.1 Combination A (strongest): Software Security '357 + M/A-Com WO 88/02202 + Sony '169 + Macrovision '649, and the DVD-Video Specifications

'357 supplies the entire challenge–response economic core.

"generating a first key based on said data and said random factor, transmitting the first key to a processing center which controls the user of the distributed program, sending a second key from the processing center to the user which second key is related to said user's first key, entering the second key in the user's computer…, comparing…, denying access…when said comparison fails to produce a match."
— US 5,337,357, claim 1

Map to claim 1:

The only material gap in '357 alone is that it is described for a general-purpose computer and for installation-time, not playback-time, authorization.

WO 88/02202 closes the "light-readable disc / per-request access" gap. As described in the EP 0636962 translation, it is a CD-ROM system in which the user's computer sends a unique identifier plus a file identifier to a processing center, the center checks credit conditions and user authorization, and (if authorized) returns a key that is combined algorithmically to decrypt the requested file. That is per-access, not per-installation, and it is on a light-readable disc.

Sony '169 closes the "unlock a program on an optical disc using an access code verified at the drive" gap, and '169's claim 10 supplies "establishing a disk identification code" and "verifying said entered access code on the basis of said established disk identification code."

Macrovision '649 closes the "optical video disc, pay-per-use, player decides" gap — its player "plays a particular optical disc only if" the IDs match, and it expressly looks forward to DVD and to a telephone-linked transaction service center.

The DVD-Video Specification closes the residue of L1 — because '179 admits that conforming players must have a random-number generator.

4.2 Combination B: WO 88/02202 + '216 (Uniloc) + '357 + Sony '169

Substitution variant: WO 88/02202 for the CD-ROM/processing-center architecture, '216 for the "same algorithm replicated at the registration authority" (= L4) and "use only if IDs match" (= L6), and '357 for the per-attempt random factor (L1) — since '216's LUID is derived from user/product information rather than a fresh random value each time.

4.3 Why a PHOSITA would have combined them (KSR rationales)

1. Same field of endeavor / reasonably pertinent art. All of '357, WO 88/02202, '216, '169, '433 and Macrovision '649 address the same problem: controlling use of mass-distributed digital content by requiring a remotely issued authorization code. A POSHITA working on DVD content protection in 1997 would have looked directly at the software-registration and CD-ROM-unlock literature. In re Keller (test the combined teachings); KSR ("familiar elements performing the same function").
2. Known problem → known solution (express TSM). '357 states verbatim the problem '179 sets out to solve: if the key "is the same for all copies of this program…the caller [may] simply give the key to a third party who then may access the program without paying." '179's Background complains of the identical risk ("limits the user's ability to make unauthorized use of the recorded material"). Combining '357's random-factor-derived first key with WO 88/02202's CD-ROM retrieval control is the solution to that stated problem.
3. Express design incentive / market force (KSR factor (vi)). '179's own Background admits the market pull: "Many consumers…do not want to view a movie more than once," "Movie distributors also seek to offer pay-per-view functionality for movies recorded on DVD-Video discs," and DIVX is a "recently announced" competing pay-per-view DVD format. Market demand for pay-per-use optical video was therefore the explicit driver.
4. "Finite number of identified, predictable solutions" (KSR factor (v)). By 1997 the known options for per-use optical authorization were: (a) DIVX-style format change (rejected by '179 because it requires new players), (b) disc-borne ID + access code (Sony '169), (c) disc-borne ID + player ID + rental-store authorization (Macrovision '649), (d) remote-center key derivation (M/A-Com; '357; '216). The claimed method is merely option (d) instantiated on the DVD-Video platform.
5. Simple substitution / predictable use of a known technique (KSR factors (i)–(iv)). Substituting a DVD-Video player (with its mandated RNG) for a general-purpose computer and a DVD-Video disc for a CD-ROM is the substitution of one known element for another in the same function, yielding the predicted result — indeed the stated object of '179 ("a format that can be used with existing playback equipment and that does not require the purchase of more costly, specialized hardware").
6. No teaching away. The only negative statement in '179 targets DIVX's incompatibility ("DIVX discs will not play on standard DVD-Video players"). That is a criticism of a different implementation and, if anything, directs the artisan into the claimed path; it is not a teaching away from using a standard DVD-Video player with a remote authorization service. In re Gurley/DePuy framework: a mere preference or criticism of an alternative is not a teaching away.

4.4 The strongest single doctrinal point for the challenger

'179's admission that "the DVD-Video Specifications require that conforming DVD-Video players provide a random number generator function" is a specification admission that the very hardware capability underpinning L1 was mandated by a published industry standard. Admissions in the specification about what a standard requires are usable as prior art/known-art evidence. That concession collapses the "player generates a first random number" limitation into the prior art and reduces claim 1 to the '357 + M/A-Com architecture implemented on a standard DVD-Video player.

5. Claim 3 — obviousness of the disc-identifying-information linkage

Claim 3 adds L7 (user transmits disc-identifying information; the two-random-number relationship itself "has a second predetermined relationship to the disc-identifying information").

Motivation: per-disc keying is the recognized antidote to the exact defect '357 identifies — a universal key that can be shared. Manufacture-specific serialization on optical discs was already commercial practice ('169 assigns to Sony/DADC, i.e., a disc replicator — the same industry position as '179's assignee WEA Manufacturing). KSR factor (iii)/(iv) (use of a known technique to improve a similar device in the same way). Claim 3's requirement that the user "communicat[e] the disc-identifying information" is also nothing more than the conventional practice of reading a serial number and keying it in ('179 spec: "all or part of the serial number printed on the label").

Verdict on claim 3: obvious over Sony '169 + '357 + WO 88/02202, with '216/Macrovision '649 as corroboration.

6. Claim 5 — obviousness of the challenge-indexed relationship

Claim 5's L4 variant recites that the first predetermined relationship "has a second predetermined relationship to the first random number" — i.e., the mapping from challenge to response is itself a function of the challenge value ('179's FIG. 5A/5B "table of GOVERNING RELATIONSHIPS indexed by UNIQUE KEY values," spec: "lock program 178 may randomly select a UNIQUE KEY, the program uses the GOVERNING RELATIONSHIP associated with the UNIQUE KEY").

Supporting art:

• '357 claim 2: "encrypting each program and program combination with a different algorithm and first key, generating a different second key from said processing center for each program…" — i.e., selection among plural key-derivation mappings based on an input variable.
• US 5,400,403 (RSA): abuse-resistant object/key distribution; challenge–response systems using per-challenge values are the ordinary mechanism by which a fresh response is required each time.
• WO 88/02202: per-request file identifier drives the key returned, i.e., the response mapping varies with the request parameter.

Motivation: the express rationale in the field is to defeat reconstruction of the mapping. '357 frames the threat (a shared/derivable key defeats the system); '179's spec frames the same objective ("To minimize the ability to unscrupulous decode the UNLOCK KEY, the GOVERNING RELATIONSHIP can be more complicated than the simple equation"). Selecting among plural keyed transformations according to the challenge value is a predictable design variation — an indexed lookup keyed to an input is among the most routine engineering choices, and '357 claim 2 already claims plural per-input key mappings. KSR factor (i)/(iii)/(v).

Verdict on claim 5: obvious, though its peculiar "second predetermined relationship to the first random number" phrasing is ambiguous enough that claim-construction scope matters (see § 9).

7. Claim 7 — obviousness of the disc claim (no transaction service required)

Claim 7 is the pure product claim: the disc's first program information causes the player to (i) generate a first random number; (ii) display it; (iii) prompt for a second number; (iv) generate an unlock number having a predetermined relationship to the first random number; (v) compare and retrieve the second program information only on match. Note (iv) is the local evaluation variant: the player computes the expected value itself.

Motivation: a disc replicator (Sony/DADC in '169; WEA in '179) seeking per-play control over a light-readable disc would obviously want the lock logic on the disc, because that is where the content-specific control program must live under the DVD-Video Specifications ('179: the "first play program chain" is executed on insertion). Local verification (rather than calling the service at verification time) is the natural design choice to permit offline verification after a key has been purchased — KSR factor (iv) applying a known technique (locally evaluated challenge–response) to a known device (an unlockable optical disc) ready for improvement.

Verdict on claim 7: obvious over '357 + '169 + NCR '698 (or Racal EP 0574219) + the DVD-Video Specification RNG requirement.

8. Dependent claims

• Claims 2, 4, 6 (player random-number function): anticipated/obvious outright — '179 admits the DVD-Video Specifications require conforming players to provide a random-number generator function, and '357's claim 6 uses a "random factor" as the seed. There is no non-obvious subject matter here at all; this is a pure recitation of a mandated standard feature.
• Claim 8 (DVD), 9 (DVD-Video), 10 (DVD-ROM), 11 (CD-ROM): obvious. Sony '169 is a CD-ROM (claim 11). Macrovision '649 expressly targets video discs and anticipates DVD (claim 8/9). '179's own Background and the DVD-Video Specifications supply the DVD-Video (claim 9) and DVD-ROM (claim 10) species. Choosing a disc type is a predictable variation of a claimed genus with no unexpected result (KSR; MPEP 2144.04 — election of a species from a genus where the species shares the genus's utility).

9. Counterarguments a patent owner would raise, and my assessment

1. "No reference generates a fresh random number each time the user attempts to access the information." This is the owner's best point. '357's random factor is sampled at installation; '216's LUID is derived from product/user data, not a per-attempt random. But: (a) WO 88/02202 is per-request to a CD-ROM file; (b) per-session challenge freshness is the standard anti-replay measure in challenge–response systems (GTE '208's "session encryption key"; RSA '403), so the variation is squarely within KSR factor (i)/(iii); and (c) '179's own definitional concession that "random" means merely "random-appearing" and may repeat weakens any attempt to make per-attempt freshness the point of novelty.
2. "The secondary references are computer-software, not light-readable-disc, art." Fails on both Keller/KSR (same field: use-controlled distribution of digital content) and on Macrovision '649 and Sony '169, which are directly optical-disc art and are on the face of the patent itself. WO 88/02202 is a CD-ROM reference.
3. "Claim 7's locally-generated unlock number is a security paradox — the relationship is on the disc, so anyone can read it." This is a validity argument, not a saving one: it supports obviousness (the claim recites a trivially implementable result) and bolsters the earlier-flagged § 112 enablement/written-description attack (the "GOVERNING RELATIONSHIP" genus is supported by essentially one linear equation, UNLOCK KEY = UNIQUE KEY + 7803). Note also that '179's claim 1 covers a system whose "secret" is disclosed in the lock program, which undercuts any argument that the relationship is a non-obvious cryptographic advance.
4. "The examiner considered all these references and allowed the claims." True, and this is the main procedural hurdle. The challenger must present a combination the examiner did not make — most concretely, WO 88/02202 + '357 + the DVD-Video Specification RNG admission + Sony '169, presented as a single coordinated ground with an explicit motivation statement, rather than as scattered references each distinguished in isolation. This is precisely the ground the earlier section flagged as unburnt by any IPR.

10. Secondary considerations (Graham factor 4)

I found no evidence of secondary considerations supporting patentability, and several that cut the other way:

• No known commercial success, licensing, or industry praise associated with '179 — consistent with the earlier finding of no litigation and no PTAB activity, i.e., low assertion pressure.
• DIVX — a competing pay-per-view DVD scheme publicly announced in 1997 — is contemporaneous industry evidence that pay-per-use optical video was an active, recognized market need, not an unrecognized problem. That supports motivation and negates "unexpected" demand.
• Contemporaneous third-party work in the same space (Sony '169, 1993-1996; Macrovision '649, 1995-1998; Uniloc '216, 1993-1996; Software Security '357/'962, 1993-1995) shows a crowded, converging art — the classic KSR "predictable results" signal rather than a lone inventor's breakthrough.
• Copying/nexus: none established. The '179 family's later history (WEA → Cinram → Technicolor) offers no documented nexus between any commercial product and the claimed subject matter.

11. Bottom line

Claims 1, 2, 3, 4, 5, 6, 8, 9, 10 and 11 are, in my assessment, invalid under § 103(a) on the following grounds:

The single most dangerous reference combination for the patent owner is Software Security '357 + WO 88/02202 + Sony '169 + the DVD-Video Specification random-number-generator admission. It maps every limitation of claim 1 onto art that predates the 1997-09-05 priority date by two to ten years, and it is motivated by the very problem '357 articulates in haec verba and '179 restates in its Background. Because no IPR has been filed (per the earlier PTAB section), this ground remains fully available in a defensive ex parte reexamination under 35 U.S.C. § 302 with no § 315(b) bar and no § 315(e) estoppel.

Two honest caveats. (1) I verified the substance of US 5,337,357, WO 94/07204/US 5,490,216, US 5,513,169, US 5,754,649, and a German-language description of WO 88/02202; the mappings for US 4,651,698, US 4,991,208, US 5,400,403, US 5,426,701, US 5,379,433, WO 95/35533, WO 96/08756, EP 0 653 695, EP 0 691 762 and US 5,784,460 rest on the titles as rendered on the '179 face and on '179's own characterizations, and must be verified against the reference bodies before any ground is filed. In particular, the WO 88/02202 teaching I rely on reached me through a third-party (EP 0 636 962 / DE 694 33 077 T2) description, not from the WO document itself. (2) The claim-construction scope of the phrase "second predetermined relationship to the first random number" in claim 5 is genuinely uncertain and could either broaden or narrow that ground. Neither caveat disturbs the claim 1, 2, 3, 4, 6, or 7–11 analysis.