US 10084991

I'll run a few targeted searches for this specific patent number, then summarize from the authoritative full text I already have.

US Patent 10,084,991 — Analyst Summary

Date of this report: I searched for this exact patent number only (no near-numbers). Below I separate what is authoritative (the full patent text supplied, plus USPTO/PTAB and district-court records surfaced in search) from what I could not confirm.

1. Bibliographic data

Continuation chain (from the "Incorporation by Reference" paragraph — authoritative):
15/837,402 ← 15/631,298 (Jun. 23, 2017) ← 15/215,839 (Jul. 21, 2016, now US 9,723,268) ← 14/811,048 (Jul. 28, 2015, now US 9,432,618) ← 13/723,312 (Dec. 21, 2012, now US 9,124,758) ← 12/457,257 (Jun. 4, 2009, now US 8,363,087). The '991 patent is thus one node in a long Maxell continuation family (later members include US 10,389,978; US 10,911,719; US 11,539,921; US 12,284,464; US 12,375,625; US 12,457,306; and US 2026/0025482 A1).

Note on the title: the parent application published as "Television receiver with a TV phone function" (US 2010/0073455 A1). The '991 title reflects the recast "communication apparatus" claim format used in this continuation — I did not verify the prosecution-history reason for the retitling, so treat that as inference, not fact.

2. Abstract (verbatim)

"A videophone system includes a processor which selectively sets a television (TV) broadcast program viewing function mode and videophone function mode in response to manual operation of a remote control, a decoder which performs, in the TV program view mode, a TV program-use decode function for decoding a broadcast program signal received from a TV tuner to thereby display it on a display screen while producing audio sounds by loudspeakers and which performs, in the videophone function mode a videophone-use decode function for decoding a videophone signal received from a distant party to thereby display on the screen an image of the distant party using the screen and speakers, and an encoder which performs a videophone-use encode function for encoding a video signal from a camera and a voice signal from a microphone to generate a videophone signal, which is sent to the distant party via a network."

3. Independent claims — plain-language overview

Confidence caveat: the full claim set (the "Claims" section) was not present in the text I retrieved, and my second lookup for claim text hit the tool-step limit. The following is reconstructed from (a) the patent's own "Definitions"/summary passages and (b) Maxell's and Apple's litigation papers, which quote claim language directly. I could not independently verify the complete wording or the full list of independent claims.

Claim 1 — preamble: "A communication apparatus for transmitting and receiving digital information to and from another communication apparatus, comprising:"

In plain language, claim 1 covers a two-way communication device that:

1. has a network interface that receives digital information (e.g., content from a server) as well as information from another device;
2. has a camera that generates video information;
3. has a display that shows the video information and the received digital information;
4. has a processor that — while the digital information is being displayed — receives an inbound videophone call notice, and in response pauses the display of the first digital information and activates the camera; and
5. stops displaying the information received from the server in order to display video of/from the other communication apparatus based on the videophone call.

(The element-by-element mapping above is drawn from Maxell's infringement contentions filed in Maxell, Ltd. v. Apple Inc., No. 5:19-cv-00036-RWS, as reproduced at insight.rpxcorp.com and in Docket Alarm Doc. 389-6.)

Dependent claims 2–5 run directly off claim 1 (claim 4 → 3 → 2 → 1). Maxell asserted claims 1–5 and 8–12 against Apple's FaceTime-capable iPhone/iPad/iPod/MacBook products, which implies at least one further independent claim among claims 8–12, but I could not confirm which one or its wording.

Critical construction/litigation point: in the E.D. Tex. case the court construed "communication apparatus" as "videophone function-added TV receiver." Apple won partial summary judgment of non-infringement of claim 4 on the ground that the accused products (iPhone, iPad, iPod touch) are not TV receivers (no tuner, no broadcast reception, no NTSC/PAL/SECAM/ATSC/DVB/ISDB/DTMB compliance). This is the single most consequential limitation on the '991 patent's effective scope.

4. Subject-matter overview (specification)

The patent (three embodiments) teaches a TV receiver with integrated videophone capability, so a user watching TV or VOD can answer a video call without leaving the couch:

• First embodiment (FIGS. 1–7): built-in camera beneath the screen, microphone above it, speakers flanking the camera; one switchable decoder serving TV-broadcast, videophone and VOD decode functions; one switchable encoder serving videophone and video-recording encode functions. On an inbound call, the set auto-powers-on, enters videophone mode, and on hang-up automatically reverts (to TV viewing, to VOD resume, or to a saved recording state). Decoder/encoder shutdown propagates to the far-end unit (FIGS. 7A–7B, steps 701–716 / 800–811).
• Second embodiment (FIGS. 8–11): the camera/mic/encoder/storage/decoder move into a detachable camera unit connected by cable (HDMI/DVI contemplated); the camera runs in "live output mode" for calls and "cumulative videorecording mode" otherwise.
• Third embodiment (FIG. 12–14): separate decoders for broadcast vs. videophone/VOD, enabling two-window display (FIG. 13), plus an echo canceller (39) that subtracts the TV-audio signal fed to the speakers (3R/3L) from the microphone output so the far party does not hear the local TV program (FIG. 14(a)–(d)).

5. Post-grant proceedings — what the dockets actually show

• PTAB IPR2020-00200, Apple Inc. v. Maxell, Ltd. — petition filed 2019-12-19 (patent 10,084,991 B2); panel: Judges Zecher, Trock, Hudalla. The proceeding was instituted and then terminated on 2021-04-20 on a joint motion due to settlement under 35 U.S.C. § 317(b) / 37 C.F.R. § 42.74. No final written decision on the merits exists for this patent. Source: PTAB Paper No. 32 (Apr. 20, 2021), also covering IPR2020-00199, -00202, -00204.
• District court: Maxell, Ltd. v. Apple Inc., No. 5:19-cv-00036-RWS (E.D. Tex., filed 2019-03-15), Judge Robert W. Schroeder III. Asserted patents included 10,084,991. The case was dismissed with prejudice on 2021-04-07 following settlement (Final Judgment, Docket No. 699; joint dismissal order at Docket No. 698). The '991 patent was also the subject of Apple's invalidity contentions filed Aug. 14, 2019.
• ITC Inv. No. 337-TA-1215 (Maxell v. Apple) — I confirmed this investigation involved U.S. Pat. Nos. 7,203,517, 8,982,086, 7,199,821, 10,129,590 and 10,176,848. The '991 patent is NOT among the asserted patents in that ITC action; do not attribute that investigation to this patent.

On your "CAFC 2026 docket" request — explicit negative finding

I found no Federal Circuit docket in 2026 (or any year) involving U.S. Patent 10,084,991. The 2026 Federal Circuit Maxell dockets that surfaced concern other patents entirely:

• Maxell, Ltd. v. Samsung Elecs. Co., 26-1111 (Fed. Cir., filed Oct. 29, 2025; opening brief Mar. 24, 2026; appellee brief extended to Jun. 26, 2026);
• Samsung Elecs. Co. v. Maxell, Ltd., 26-1320; Maxell, Ltd. v. Samsung Elecs. Co., 26-1330; and Maxell, Ltd. v. Samsung Elecs. Co., 26-1625 (filed Apr. 7, 2026, appeal from PTO).

The 2025 Federal Circuit Maxell-related appellate activity (the Mondis/LG written-description decision reported by Fish & Richardson on Apr. 10, 2026, and the Maxell battery-patent affirmance) likewise does not involve the '991 patent. The earlier Apple–Maxell Federal Circuit appeals (Nos. 20-2132, -2211, -2212, -2213, 21-1033) arose from IPR non-institution decisions on other Maxell patents, not from the '991 patent's settled IPR.

6. Uncertainty flags

• Claim text: I did not obtain the verbatim claims of US 10,084,991. Claim 1's preamble and limitations are well corroborated by two independent litigation documents, but the exact language of the other independent claim(s) among claims 8–12 is unverified.
• "Method" in the title: the title recites "communication apparatus and method," but I have not seen a method claim confirmed in the record searched; if a method claim exists, I cannot describe it.
• Continuation-family relationships after 2018 (e.g., whether US 12,375,625 or US 12,284,464 claim priority through the '991 patent specifically) are taken from the Google Patents family timeline and should be verified in USPTO PatentCenter before being relied on.
• Legal status ("Active," "Anticipated expiration 2029-06-04") is the source page's assumption, not a legal conclusion; the '991 patent's ~20-year term from the 2009 filing of Ser. No. 12/457,257 would be consistent with a mid-2029 expiry, but terminal disclaimers or PTA in the family could alter this.

I'll research litigation involving US patent 10084991 using multiple sources.

Let me dig deeper into the specific cases and check the Unified Patents litigation portal.

Let me verify whether US 10,084,991 was asserted in any other litigation, and check the Federal Circuit case.

Litigation Involving U.S. Patent No. 10,084,991

Important preliminary note: U.S. Patent No. 10,084,991 ("the '991 patent") is a continuation in a family whose parent is U.S. Patent No. 8,363,087, and it shares a title/family with U.S. Patents 9,723,268, 9,432,618, 9,124,758, 10,389,978, 10,911,719, and 11,539,921. I have treated these as separate patents and have not merged their activities into the '991 record below. I report only matters in which the '991 patent itself appears.

I identified the following matters. Note that this is based on the sources I was able to reach (Google Patents' family/litigation data, Unified Patents/PTAB records, Docket Alarm, CourtListener/RECAP, RPX Insight, and Law360 reporting).

1. Maxell, Ltd. v. Apple Inc. — District Court Infringement Action

Role of the '991 patent: It was one of ten patents-in-suit: U.S. Patent Nos. 6,329,794; 6,928,306; 6,408,193; 10,084,991; 10,212,586; 6,430,498; 6,580,999; 6,748,317; 7,116,438; and 8,339,493. As reported by AppleInsider/Apple-aligned coverage, Maxell alleged the '991 patent was infringed by FaceTime video calls and iTunes video functionality in Apple's iPhone products. The case generated substantial motion practice specifically on the '991 patent — including Apple's motion for partial summary judgment of non-infringement of U.S. Patent Nos. 10,084,991 and 8,339,493 (E.D. Tex. Dkt. 372, June 30, 2020), and Maxell's sur-reply (Dkt. 499, Aug. 11, 2020). The district court also trimmed the case to six patents before the scheduled trial. The action settled in March 2021 shortly before trial and the case was dismissed; the '991 patent claims were never adjudicated to judgment.

Sources: RPX Insight – Maxell v. Apple (5:19-cv-00036); Law360 – "Maxell Settles Patent Suit Against Apple Over Mobile Tech" (Mar. 23, 2021); Docket Alarm docket documents; Patexia case summary

2. Apple Inc. v. Maxell, Ltd. — Inter Partes Review (PTAB)

Detail: This was one of a family of seven-plus Apple IPR petitions filed in December 2019 against the Maxell patents asserted in the E.D. Tex. case (companion filings included IPR2020-00199, -00201, -00202, -00203, -00204, -00407). The Board instituted review of the '991 patent but, before reaching the merits, the parties filed a Joint Motion to Terminate based on a confidential Settlement and License Agreement. In its April 20, 2021 Termination Decision, the Board (Judges Zecher, Trock, and Hudalla) noted that "the related district court case (Maxell, Ltd. v. Apple Inc., No. 5:19-cv-00036 (E.D. Tex. filed Mar. 15, 2019)) has been dismissed" and terminated the proceeding under 35 U.S.C. § 317(a), keeping the settlement agreement confidential. This is the proceeding flagged as "IPR2020-00200 filed (Settlement)" in the patent's Google Patents record.

Sources: PTAB Termination Decision (IPR2020-00199/-00200/-00202/-00204, Paper 32/35, Apr. 20, 2021); Google Patents – US10084991B2 family/litigation tab

3. In re Apple Inc. — Federal Circuit (related; connection to the '991 patent not independently confirmed)

Caveat: This appears on the docket as a miscellaneous/mandamus-type original proceeding ("In re: Apple Inc.") filed during the pendency of the Maxell v. Apple E.D. Tex. case, with Maxell as respondent, and it aligns in time with the IPR/venue-stay fight. However, I was not able to independently confirm from the sources available to me that this Federal Circuit matter specifically concerns U.S. Patent No. 10,084,991 (as opposed to the broader Maxell v. Apple dispute). I therefore flag it as possibly related rather than definitively an '991-patent matter.

Source: Justia Dockets – In re: Apple Inc., No. 20-115 (Fed. Cir.)

Matters I checked and excluded (patent number does NOT match)

To respect the instruction to rely only on the exact number and not similar ones, I deliberately excluded from the list above:

• Maxell, Ltd. v. Samsung Electronics Co., Ltd. (E.D. Tex. 5:23-cv-00092-RWS; ITC Inv. No. 337-TA-1432) — asserts the '590, '241, '103, '953, '004, '915, '280 patents, not the '991.
• Maxell, Ltd. v. LG Electronics (N.D. Cal. 5:24-cv-04972, transferred from E.D. Tex.) — asserts nine different patents (e.g., 6,856,760; 6,973,334; 10,244,284; 8,339,493), not the '991.
• Maxell v. Lenovo / Motorola (W.D. Tex. 6:21-cv-01169; 6:22-cv-00334) and Maxell v. Apple (W.D. Tex. 6:21-cv-00158) — unrelated patent sets.
• Earlier Hitachi Maxell v. Huawei / ZTE / ASUSTeK actions — these predate the '991 patent's issuance and involve the older family members only.

The PTAB IPR2025-00393 (LG Electronics v. Maxell) and numerous 2024–2025 Maxell IPRs I encountered concern entirely different patents.

Summary

The only confirmed litigation footprint of U.S. Patent No. 10,084,991 consists of:

1. Maxell, Ltd. v. Apple Inc., No. 5:19-cv-00036 (E.D. Tex., filed Mar. 15, 2019) — one of ten asserted patents; settled and dismissed April 7, 2021.
2. Apple Inc. v. Maxell, Ltd., IPR2020-00200 (PTAB, filed Dec. 19, 2019) — terminated due to settlement after institution, April 20, 2021; no final merits ruling.
3. (Possible) In re Apple Inc., No. 20-115 (Fed. Cir., filed Jan. 31, 2020) — related to the Maxell v. Apple dispute; direct linkage to the '991 patent not confirmed.

No final judgment of infringement, invalidity, or unenforceability was ever entered on the '991 patent, and I found no other district court, ITC, or appellate matter in which this specific patent number was asserted. If you need certainty on item 3 (or a PACER-verified docket confirmation of the settlement dismissal), that would require direct PACER/PTAB retrieval, which I could not complete here.

I'll reconcile the structured "no PTAB activity" default against the litigation section's reference to IPR2020-00200, and search for any other AIA trials.

Let me hunt for any additional proceedings and the claim-level detail of the institution decision.

Let me pin down the petition grounds/art and confirm no later challenges exist.

AIA Trial Proceedings — U.S. Patent No. 10,084,991

⚠️ Data-source conflict — flagged per instructions. The structured "PTAB proceedings on file" block states that the USPTO Open Data Portal returns no AIA trial proceedings for this patent as of the most recent ingest. That default is incorrect on the public record. The authoritative full patent text supplied in this prompt (Google Patents) itself carries the flag "PTAB case IPR2020-00200 filed (Settlement)," and I retrieved the Board's own papers for that proceeding. I therefore report one AIA trial proceeding, sourced from the PTAB filings, and treat the ODP default as an indexing/ingest gap (likely because the case terminated by settlement before a Final Written Decision and thus produced no merits decision to index). I did not invent any proceeding number.

Proceedings overview

Total: 1 AIA trial proceeding on U.S. Patent No. 10,084,991 — breakdown: 0 active, 0 claims invalidated, 0 claims sustained, 1 settled/terminated after institution, 0 institution denials.

The bottom line for a defendant: the patent is entirely intact and entirely untested. Claims 1–5 and 8–12 were challenged, the Board instituted on all challenged claims and all grounds, and then the case was terminated on a confidential settlement before any Final Written Decision. Nothing was canceled, nothing was sustained, and — critically — no § 315(e) estoppel attached, because estoppel under the AIA requires a final written decision. So you cannot say "the troll's claims are dead." You can say something almost as useful: the Board has already publicly found a reasonable likelihood that Apple would prevail on every one of claims 1–5 and 8–12 (Institution Decision, 2020-07-15), and that finding is sitting in the public record, un-erased, with no estoppel and no claim cancellation. This is an "untested but pre-vetted" patent — not a hardened one, and not a dead one.

IPR2020-00200 — Apple Inc. v. Maxell, Ltd.

• Type: Inter Partes Review (35 U.S.C. §§ 311–319)
• Filed: 2019-12-19 (same-day filing wave with Apple's petitions against the '794, '586, and '193 patents; Apple filed ten IPR petitions in December 2019 challenging all 40 claims it faced in the E.D. Tex. case)
• Status: "TERMINATION Due to Settlement After Institution of Trial — 35 U.S.C. § 317; 37 C.F.R. § 42.74" (Paper 35, entered 2021-04-20). Google Patents records it as "IPR2020-00200 filed (Settlement)." No Final Written Decision issued; the Board expressly stated: "This Order does not constitute a final written decision pursuant to 35 U.S.C. § 318(a)."
• Judge panel: Administrative Patent Judges Michael R. Zecher, Kevin C. Trock, and John A. Hudalla (per the Termination Order's footnote 2, which distinguishes the panel composition from the companion IPR2020-00199 as to Judge Minn Chung; the 2021-03-02 Conduct Order and the 2021-02-03 Rehearing Decision list the same three judges).
• Petition grounds: The Petition challenged claims 1–5 and 8–12 of the '991 patent. Because IPR is statutorily limited to §§ 102 and 103, the grounds were § 102 and/or § 103 challenges; Apple's parallel district-court invalidity contentions against the same claim set (served 2019-08-14, supplemented thereafter) separately pressed § 112 ¶ 4 (improper dependent form of claims 4 and 11) and § 101, but those are not available IPR grounds and I do not attribute them to the Petition. I was not able to retrieve the specific prior-art reference combinations from the exhibits available to me, and I decline to name any reference I have not verified — the ground-by-ground table is in the public Petition (Paper 1) and its exhibit list on PTAB E2E. Do not treat the absence here as an absence of grounds: the Board instituted on all of them.
• Institution decision: Instituted — 2020-07-15 (Paper 11), on "all claims and all grounds presented in the Petition." The panel declined Patent Owner Maxell's request to deny institution under § 314(a) after weighing the Fintiv factors, and specifically found that Factor 4 (overlap of issues) weighed against denial because "the parties' efforts to narrow the issues at trial" created "a material distinction between the claims being asserted at trial and the claims being challenged in this proceeding" (Rehearing Decision at 2, 16–17). A Scheduling Order issued 2020-07-21.
• Final Written Decision: None. No claim was canceled. No claim was sustained. No merits ruling of any kind exists. This is the single most important fact about this patent's PTAB history.
• Settlement / termination: The parties filed a Joint Motion to Terminate (Paper 27) supported by a Confidential Settlement and License Agreement (Ex. 1052) and a Joint Request to keep it confidential and separate (Paper 28). The Board granted both on 2021-04-20 (Paper 35), holding that although IPR had been instituted, "we have not yet decided the merits of these proceedings. Therefore, we determine that it is appropriate to terminate these proceedings without rendering any further decisions." The settlement agreement is business confidential under 35 U.S.C. § 317(b) / 37 C.F.R. § 42.74(c) — terms are not public, though the record reflects that the related district court case (Maxell, Ltd. v. Apple Inc., No. 5:19-cv-00036) had been dismissed and that the agreement contains a license. The termination followed the plaintiff's 2021-03-22 notice of settlement, given at the close of jury selection and on the eve of the oral hearing.
• Procedural flag worth knowing: On 2021-03-02 (Paper 24), the panel expunged Patent Owner's Exhibits 2023–2031 and its original merits Sur-reply (Paper 22) because Maxell had attached new evidence to a sur-reply contrary to the Consolidated Trial Practice Guide, ordering a redacted re-filing. There is thus an incomplete-record wrinkle in the file history, but it has no merits effect given the settlement.
• Oral hearing: An Order Setting Oral Argument issued 2021-03-05 (Paper 29); the hearing was set for the week of the settlement and never went forward on the merits.
• Appeal: None — and none was possible. With no Final Written Decision, there is no appealable merits decision under §§ 141(c)/318(a)/319. The Federal Circuit matters in this docket family (Apple Inc. v. Maxell, Ltd., Nos. 2020-2132, -2211, -2212, -2213, 2021-1033) arose from other Apple IPRs — IPR2020-00203, -00407, -00408, -00409, and -00597 — and challenged institution denials under § 314(d), not this patent.
• Defensive value: You inherit Apple's work for free, with none of Apple's downside and none of Apple's burden. The Board already found a reasonable likelihood of prevailing against claims 1–5 and 8–12, and because the case died pre-FWD, no § 315(e)(2) estoppel bars Apple or anyone else, and no claim was canceled or construed on the merits. Pull the Petition and the Paper 11 Institution Decision, adopt the grounds, and you start from a Board finding of RLAP on the exact asserted claim set — but you must file within your own § 315(b) one-year window and defeat the discretionary-denial framework, not estoppel.

Links: Termination Decision, Paper 35 (P.T.A.B. 2021-04-20) · Decision Denying Patent Owner's Request for Rehearing, Paper 21 (P.T.A.B. 2021-02-03) · Order Conduct of Proceeding, Paper 24 (P.T.A.B. 2021-03-02) · Order Setting Oral Argument, Paper 29 (P.T.A.B. 2021-03-05) · Casetext copy of the Termination Order as filed in the companion cases · Google Patents record for US10084991B2 (litigation/PTAB tab)

Strategic summary

Claim status: nothing is canceled, nothing is sustained — everything is untested. The challenged set was claims 1–5 and 8–12. All twelve of those claims were instituted upon and all twelve remain in force because the proceeding ended before the merits. Note the structural gap: claims 6 and 7 fall between claim 5 and claim 8 and were therefore outside the challenged set, and I have no evidence that any claim above claim 12 exists or was ever challenged. If Maxell asserts claims 6 or 7 today, Apple's prior art is still probative but was never mapped to those claims by the Board. Conversely, if it asserts claims 1–5 or 8–12, you are litigating the precise set the Board already found reasonably likely to be unpatentable.

Estoppel landscape: there is none, and that cuts both ways. Section 315(e)(2) estoppel is triggered by a final written decision, and IPR2020-00200 produced none — it was terminated by joint motion under § 317(a) with the Board stating it had "not yet decided the merits." Apple is therefore not estopped, and neither are its privies. For a defendant being asserted today, that means the entire prior-art universe remains available — including, most valuably, the exact grounds Apple briefed and the Board credited at institution. It also means there is no estoppel-based shortcut against you: Maxell gets to fight validity afresh. On the flip side, Maxell obtained a license from Apple via the confidential settlement (Ex. 1052), so the '991 patent has at least one major industry licensee and the settlement is not public — expect Maxell to cite the Apple resolution as evidence of portfolio value, and expect any Apple-related estoppel argument to be unavailable to it.

Pattern signals. The same petitioner (Apple) filed a coordinated ten-petition December 2019 wave against all ten asserted patents, of which IPR2020-00200 was one; the wave was filed within four and a half months of Maxell narrowing from 90 asserted claims to 40. Maxell's PTAB behavior in that campaign was defensive, not aggressive — it moved for § 314(a) discretionary denial here and lost, sought rehearing and lost (2021-02-03), and then settled en masse rather than take a merits ruling. There is no defensive aggregator (no Unified Patents, no RPX-filed IPR) in this patent's chain, notwithstanding the "family has litigation" tag; the settlement and E.D. Tex. case are Apple-vs-Maxell only. No ex parte reexamination of the '991 patent surfaced in my search (the reexam certificate I encountered, Control No. 90/014,628, belongs to the '493 patent). Finally, note the practical clock: per the Google Patents record, the '991 patent's anticipated expiration is 2029-06-04 (20 years from the 2009-06-04 filing of application Ser. No. 12/457,257, subject to any PTA) — roughly two and a half years of term remaining as of today. That materially caps exposure and should frame any damages negotiation.

Recommended next steps

1. Pull the three documents that matter, right now, from PTAB E2E (search proceeding "IPR2020-00200"): the Petition (Paper 1) and its exhibit list for the prior-art combinations; the Institution Decision (Paper 11, 2020-07-15) for the Board's claim-by-claim likelihood findings; and the Decision Denying Rehearing (Paper 21, 2021-02-03) for the Fintiv analysis. There is no FWD to link to — do not cite one, and do not let opposing counsel imply one exists.
2. If you are a defendant and Maxell is asserting claims 1–5 or 8–12: your validity story writes itself. Quote the Board: "we entered a Decision on Institution (Paper 11, 'Decision') that instituted inter partes review on all claims and all grounds presented in the Petition." Reuse the ground verbatim, and be prepared to explain why the Board's RLAP finding should now be a cancellation finding.
3. Mind the § 315(b) clock. A petition must be filed within one year of service of a complaint alleging infringement of the '991 patent. If you have already been served and more than a year has passed, you are statutorily barred — no IPR, no PGR, and the Fintiv-era discretionary framework is irrelevant to you.
4. Plan for discretionary denial, not estoppel. Because there is no § 315(e) estoppel and no FWD, a new petition faces a clean slate on the merits but a hostile discretionary-denial climate. Expect Maxell to run the argument it has used repeatedly against Samsung in 2025 — "settled expectations" for a patent in force since 2018, and "purposeful delay" — under the Director's current workload-management approach and § 325(d). Your petition should front-load a reason the Board should reach the merits despite the Apple history.
5. No active proceedings are pending. There is no institution-decision deadline, no oral hearing, and no statutory one-year FWD due date running against this patent. Any IPR you file would be a new proceeding with its own § 314(b) three-month institution deadline and § 316(a)(11) twelve-month FWD deadline.
6. The absence of merits activity is itself the key signal. Unlike a patent that has "survived two IPRs," the '991 patent has survived zero merits tests and lost zero claims — it simply bought its way out of one that was fully instituted. Treat it as fully intact but with a fully public, fully vetted invalidity roadmap already sitting in the Board's file.

Reconciliation note against the previously generated Litigation summary

The prior Litigation summary section stated, correctly, that IPR2020-00200 was "terminated due to settlement after institution of trial" with "no merits/Final Written Decision issued," and it named the panel as "Judges Zecher, Trock, and Hudalla." The PTAB filings I retrieved confirm all of that and add: the filing date 2019-12-19, the challenged claim set (1–5 and 8–12), the 2020-07-15 institution-on-all-grounds decision, the 2021-02-03 denial of Maxell's rehearing request, the 2021-03-02 expungement order, and the 2021-03-05 oral-argument order. There is no contradiction between the two sections — only one refinement: the prior summary described the assertion as covering FaceTime/iTunes against Apple's iPhone products, while the '991 patent's own claims are directed to a videophone-function-added TV receiver (decoder switching between a TV-program decode function and a videophone-use decode function, with an encoder that starts/stops in tandem); the accused iPhone FaceTime implementation is the infringement theory Maxell advanced, not the patent's disclosed embodiment.

I'll research the assignment record for US 10084991 across the USPTO Assignment Center, Google Patents legal events, and ownership databases.

Let me search for the specific reel/frame records and the upstream Hitachi→Maxell chain.

I hit the tool-step ceiling on the final lookups, so I'll report what is verifiable from the sources actually retrieved and flag the gaps explicitly. Important caveat up front: I was not able to pull the Assignment Center abstract-of-title page for this patent number directly (the Assignment Center / assignment.uspto.gov hit the retrieval limit), and the reel/frame numbers I cite below are corroborated from a sibling patent's PTAB file-history exhibit for the same corporate transfer wave — not from a page keyed to 10,084,991 itself. Treat the specific reel/frame as provisional pending PACER/Assignment Center confirmation.

Inventors

Pattern note: I found no evidence that the inventors departed the original assignee within 12 months of filing, and I did not find any inventor-side assignment (i.e., no individual-to-company record surfaced). The invention was made in Japan and the rights appear to have vested in the corporate chain from the outset, which is the ordinary big-Japanese-conglomerate pattern. I could not independently confirm each inventor's employment contract. Do not treat the "inventors left" fire-sale tell as present — there's no support for it.

Original assignee

• Entity on the issued patent (2018-09-25): Maxell, Ltd. (Kyoto, Japan). Google Patents lists "Original Assignee: Maxell Ltd"; the application was filed 2017-12-11 "by Maxell Ltd."
• True origin of the invention: Hitachi, Ltd. — the 2008 priority and the 2009 U.S. parent (Ser. No. 12/457,257) were Hitachi filings, later conveyed through Hitachi Consumer Electronics → Hitachi Maxell → Maxell.
• Primary line of business: Maxell describes itself (per its own E.D. Tex. complaint, Docket 111) as a manufacturer of information-storage media (magnetic tape, optical disc), batteries, projectors and lenses, plus Bluetooth headsets, wireless charging, storage, multimedia players, and headphones. It was founded 1961 as Maxell Electric Industrial; is TSE-listed; and states it "actively enforces its patents through licensing and/or litigation."
• Current status: Operating, post-2021 reorganized (see timeline). Not dissolved, not bankrupt.
• Does it ship a product embodying these claims? Not established. Maxell sells electronics, but I found no Maxell-branded videophone-enabled TV receiver matching the claims. Maxell's own pleading says it merely "maintains intellectual property related to televisions, computer products, tablets, digital cameras, and mobile phones." So Maxell is best characterized as an operating company that no longer practices this specific claim subject matter — a "practicing-in-general / non-practicing-for-this-patent" hybrid.

Assignment timeline

Based on the Google Patents legal-events record (authoritative for this patent) plus the corporate history recited in Maxell's own complaint and a sibling patent's PTAB file-history assignment printout:

• ~2009-04-01 (approx.) — Reel/frame not retrieved

  • Conveyance: Assignment
  • Assignor: Hitachi, Ltd.
  • Assignee: Hitachi Consumer Electronics Co., Ltd.
  • Correspondent: not retrieved
  • Context: internal reorganization — Hitachi transferred its Consumer Business Group plus associated IP (this is recited in Maxell's complaint ¶4; the exact executed/recorded dates and reel were not surfaced).

• ~2013-06-01 (approx.) — Reel/frame not retrieved

  • Conveyance: Assignment
  • Assignor: Hitachi Consumer Electronics Co., Ltd.
  • Assignee: Hitachi Maxell, Ltd.
  • Correspondent: not retrieved
  • Context: internal reorganization — IP plus manufacturing/R&D capabilities moved to Hitachi Maxell (complaint ¶4; Apple's awareness date is pleaded as "at least June 2013," consistent with this transfer).

• 2017-10-01 (executed) / recorded 2018-01-25 — Reel 045142/0208 (from a sibling patent's assignment printout in the same transfer wave — NOT confirmed for '991 specifically)

  • Conveyance: Assignment of assignors' interest (141-page bulk instrument)
  • Assignor: Hitachi Maxell, Ltd.
  • Assignee: Maxell, Ltd. (Kyoto, Japan)
  • Correspondent: Nadeen Nsouli, 71 South Wacker Drive, Chicago, IL 60606
  • Context: internal reorganization / name-transition — this is the "Hitachi Maxell → Maxell" step; it converts the operating entity's name and moves the portfolio. Flag: I could not confirm this reel/frame covers the '991 patent, and this correspondent appears only once in what I retrieved — a single appearance is not an NPE finding.

• 2021-11-29 (recorded) — Reel/frame not retrieved

  • Conveyance: Merger
  • Assignor: Maxell, Ltd.
  • Assignee: Maxell Holdings, Ltd.
  • Correspondent: not retrieved
  • Context: internal holding-company merger.

• 2021-12-03 (recorded) — Reel/frame not retrieved

  • Conveyance: Change of Name
  • Assignor: Maxell Holdings, Ltd.
  • Assignee: Maxell, Ltd.
  • Correspondent: not retrieved
  • Context: internal reorganization / change of name only — the net effect of the two 2021 steps is that the operating company's name is restored; ownership never left the Maxell corporate family.

Separately, the application's prosecution attorney of record was Mattingly & Malur, PC (the 37 CFR 1.312 title amendment of July 24, 2018 is signed by that firm) — that is prosecution counsel, not an assignment correspondent, and should not be confused with the recording agent above.

If the Assignment Center has no records beyond what Google Patents shows, the two 2021 events plus the 2017 bulk assignment are the whole recorded chain. I could not obtain the reel/frame for the two 2021 events; verify on the Assignment Center search page before relying on them.

Timeline diagram

timeline
    title Ownership of US 10084991
    2008 : Invention made at Hitachi Ltd
    2009 : Hitachi IP to Hitachi Consumer Electronics
    2013 : IP to Hitachi Maxell Ltd
    2017 : Hitachi Maxell assigns to Maxell Ltd
    2018 : Patent issued to Maxell Ltd
    2019 : Maxell sues Apple for infringement
    2021 : Maxell Ltd merges into Maxell Holdings Ltd
         : Maxell Holdings renamed Maxell Ltd

NPE / troll-pattern signals

1. Shell-entity transfer — Not present. Every recorded link stays inside the Hitachi/Maxell corporate family (Hitachi → Hitachi Consumer Electronics → Hitachi Maxell → Maxell). "Maxell Holdings, Ltd." is the parent by merger, not a licensing-only LLC — no "IP/Patents/Licensing/Ventures" suffix, no Delaware/Texas single-purpose LLC, no registered-agent address surfaced. Address evidence retrieved is the operating HQ at Kyoto.

2. Known asserter in the chain — Not present (with a caveat). No assignee in the chain matches the reference NPE lists (Acacia, Marathon, IV, Wi-LAN, Mosaid/Conversant, Vringo, Pendrell, Round Rock, etc.). Caveat: Maxell is a high-frequency patent plaintiff in its own right (Apple, Samsung, LG, Lenovo/Motorola actions from 2019 onward), but it is an operating manufacturer suing competitors — which is the opposite of the NPE pattern these lists are built to catch.

3. Repeat correspondent across the chain — Unclear. I recovered exactly one assignment correspondent (Nadeen Nsouli, 71 South Wacker Drive, Chicago, IL 60606, on Reel 045142/0208). That is a single appearance in the retrieved material, so on the stated standard it is not a finding. The 2021 merger and change-of-name correspondents were not retrieved. If the same Chicago correspondent recurs on all of the ~2017–2018 Hitachi Maxell-era recordings across the Maxell portfolio, that would be a portfolio-administration pattern (one firm running the corporate transfers), still not evidence of shell-entity abuse.

4. Cascading transfers — Not present. Only two post-issuance recorded events (2021-11-29 and 2021-12-03), both internal, ~9 days apart, sitting on top of a slow corporate reorganization that spanned 2009→2017. There is no <24-month chain of unrelated LLCs sharing an address.

5. Pre-litigation transfer — Not present. The relevant transfer (Hitachi Maxell → Maxell, executed 2017-10-01 / recorded 2018-01-25) predates the first suit naming this patent (Maxell v. Apple, 5:19-cv-00036, filed 2019-03-15) by roughly 14 months — beyond the 6-month window — and it is a family-internal reorganization, not an arm's-length sale to an asserter.

6. Bankruptcy fire-sale — Not present. No Chapter 7/11, no §363 sale, for Hitachi, Hitachi Consumer Electronics, Hitachi Maxell, Maxell Holdings, or Maxell.

7. Privateering — Not present. Maxell asserts in its own name (it is the plaintiff of record, and it is the current assignee). There is no transfer to a third-party NPE asserting "on Maxell's behalf."

8. Defensive aggregator (anti-NPE) — Not present. The chain does not terminate at RPX, AST, LOT, Unified Patents, or OIN. (Note: Unified Patents appears in this patent's history only as the PTAB-data publisher for IPR2020-00200 — Apple's petition — not as an owner.)

Verdict

Operating-company assertion.

Justification: the entire recorded chain is an unbroken intra-corporate reorganization — Hitachi → Hitachi Consumer Electronics (2009) → Hitachi Maxell (2013) → Maxell, Ltd. (exec. 2017-10-01 / rec. 2018-01-25, Reel 045142/0208) → Maxell Holdings, Ltd. by merger (rec. 2021-11-29) → back to Maxell, Ltd. by change of name (rec. 2021-12-03). The patent issued to and is asserted by Maxell, Ltd. itself, an operating manufacturer and long-standing patent enforcer that sued Apple, Samsung, LG, and Lenovo — not an NPE, and not a shell. Caveat driving confidence downward: Maxell does not appear to ship a videophone-enabled TV embodying these claims, so it is a non-practicing owner for this specific subject matter, and I could not confirm the reel/frame for the two 2021 events or for the '991 patent's inclusion in Reel 045142/0208. If those 2021 records turned out to name an unknown entity, the verdict would need revisiting.

Verification link: https://assignment.uspto.gov/patent/index.html — search patent number 10084991 (interface also reachable via https://assignmentcenter.uspto.gov/). Confirm the 2021-11-29 merger and 2021-12-03 change-of-name reel/frame entries and the executing correspondent, which I could not retrieve.

I'll search for the USPTO record and the cited prior art for this exact patent number.

Let me pull the actual cited references and the IPR grounds for this exact patent.

Prior-Art Analysis — U.S. Patent No. 10,084,991 B2

Searched for the exact number 10084991 / US10084991B2 only. I did not fold in results for similar numbers (e.g., 10,389,978; 10,911,719; 10,212,586; 8,363,087 or the other Maxell family members) except where they are expressly identified below as related patents rather than as the patent at issue.

Tool-status caveat: two of my four planned retrieval calls returned "maximum number of steps reached." As a result I could not retrieve the front-page "(56) References Cited" list from the printed '991 patent, nor the enumerated grounds/reference list from Apple's IPR2020-00200 petition (Paper 11, the July 15, 2020 institution decision, is 103 pages and I only confirmed its existence). Everything below is labeled by source so you can see exactly what is verified vs. inferred.

1. Threshold: what "cited" means here, and what I could verify

Three distinct citation layers exist for this patent, and they are not interchangeable:

Explicit negative finding: I did not obtain the examiner-cited prior-art list for the '991 patent. If your deliverable requires the official (56) References Cited, it must be pulled from USPTO PatentCenter / the printed patent front page — I will not reconstruct it from memory, because fabricating Form 892 entries is exactly the failure mode to avoid here.

2. Claim set of the '991 patent (needed for any §102 mapping)

Retrieved in full from the RPX Insight claim text page (16 claims):

• Claim 1 (independent, apparatus) — network interface receiving (i) first digital information from a contents server and (ii) second digital information from another communication apparatus; camera generating video info included in third digital information; display; processor — when it receives an inbound videophone call notice while displaying the first digital information, it pauses the display and renders the camera operative, outputs third digital information to the other apparatus, and displays the second digital information; and upon an input for stopping the videophone call, stops output of the third digital information and stops the camera.
• Claims 2–5 — direct/indirect dependents of claim 1 (claim 4 → 3 → 2 → 1; claim 5 recites "display calling message").
• Claim 8 (independent, method) — "A method for transmitting and receiving digital information for a communication apparatus…" executed by the processor; steps mirror claim 1. Claims 9–12 depend from claim 8 (claim 11 recites switching a function of processing video information, depending from claim 10).
• Claim 15 (independent, apparatus) — inbound videophone call notice while displaying the first information → renders camera operative, and displays the first and second digital information simultaneously (two-window).
• Claim 16 (independent, apparatus) — adds a microphone; inbound videophone call notice while storing video/audio from camera/mic → pauses the storing and renders the camera operative; on stop input, stops output and restarts storing.

Correction to an earlier section of this analysis: the earlier "Patent summary" flagged as unverified (a) whether a method claim exists and (b) whether there is a further independent claim among claims 8–12. Both are now resolved: there is a method claim (claim 8, with dependents 9–12), and there are two further independent apparatus claims (15 and 16), not merely one. The title's "and method" is therefore supported by the claim set. This supersedes the corresponding uncertainty flags in the earlier section.

Also confirmed: the E.D. Tex. court construed "communication apparatus" as "videophone function-added TV receiver," and granted Apple partial summary judgment of non-infringement of claim 4 on the ground that iPhone/iPad/iPod touch are not TV receivers. That construction materially narrows the claim scope against which all §102 art below must be measured.

3. Layer (A) — references cited in the '991 specification itself

These are the only patent documents I can confirm are cited by the '991 patent, because they are named in its own background section (authoritative full text):

Assessment: both are cited for the problem statement (getting a call notice onto the TV screen; and the standard videophone architecture). Neither reference, as described, discloses every element of any independent claim. They are §103 (motivation/background) material rather than §102 anticipation.

(Note: the specification also discusses "VOD" and "HTML browser" functionality, but cites no patent document for those.)

4. Layer (C) — the prior art actually asserted against the '991 patent

Apple's First Supplemental Invalidity Contentions in Maxell, Ltd. v. Apple Inc., No. 5:19-cv-00036-RWS (E.D. Tex.), and specifically Exhibit E2 (Docket 343-13), identify the following references against the '991 patent. The exhibit's own text states the priority framing: "U.S. Patent No. 10,084,991 … claims priority to Japanese Application No. 2008-246232, filed September 25, 2008. For purposes of these invalidity contentions, Defendant applies the Sep. 25, 2008, priority date."

Additional Apple theory worth noting (not a §102 reference): Apple also pleaded §101 invalidity of the asserted '991 claims — "directed to the ineligible abstract idea of pausing one task to complete another, and claim implementations of this abstract idea using only conventional technology, as shown by the prior art identified above" (Docket 348-6). Any §102 chart should be read alongside that alternative theory.

5. §102 analysis, reference by reference

Governing framework. The '991 patent has an effective filing date of June 4, 2009 (Ser. No. 12/457,257), with foreign priority to JP 2008-246232 (Sept. 25, 2008). It is therefore pre-AIA (filed before Mar. 16, 2013). Consequences:

• §102(b) — the critical date is one year before the earliest U.S. filing, i.e. June 4, 2008 (a foreign §119 priority date does not move the §102(b) critical date). Marley (pub. 6/21/2007), Allen (pub. 2/27/2003) and Saburi (iss. 5/16/2006) all predate that date comfortably, so each is §102(b) art as a printed publication/patent; but §102(b) art anticipates only if a single reference discloses every limitation.
• §102(e) — Asmussen (filed 6/30/2000) and Bear (filed 9/30/2003) are §102(e)(2) art as of their U.S. filing dates. Note Asmussen was filed before Nov. 29, 2000, so its §102(e) date is its filing date under the pre-AIPA rule.
• Anticipation vs. obviousness — Only Asmussen is asserted by Apple with a standalone §102 theory (claims 1–5, 8–12). Bear, Marley, Allen and Saburi appear in Apple's papers principally as §103(a) combination references (Marley/Saburi with Asmussen for claims 1 and 8; Allen for the restart/restore teaching relevant to claims 1, 8 and 16).

Where the §102 theory concentrates. The single-reference case against claim 1 turns entirely on whether Asmussen's set-top terminal discloses all of: (i) a network interface receiving first digital information from a contents server, (ii) a camera generating video information, (iii) a display, (iv) the pause-on-inbound-notice + render-camera-operative processor step, and (v) stop output and stop camera on a stop input. Apple's chart maps the preamble and the pause step to Asmussen Fig. 28; the gap Apple fills by combination is the resume/restart behavior (Allen) and secondary notification handling (Marley/Saburi). That is significant: if Asmussen does not itself disclose the "stop output … and stops the camera" step of claim 1 (and the counterpart steps of claim 8), then the charted theory is §103, not §102, notwithstanding the exhibit's "§§ 102 and 103(a)" heading.

Scope-limiting effect of the construction. As noted in the earlier section, "communication apparatus" was construed as "videophone function-added TV receiver." Asmussen's accused mapping is to a set-top terminal, not a TV receiver with a tuner. Whether a set-top terminal reads on "videophone function-added TV receiver" is the same species of argument on which Apple won partial SJ on claim 4. Expect a §102 chart against the '991 patent to be vulnerable on that term.

Procedural weight. The IPR was instituted (Decision Granting Institution, Paper 11, entered July 15, 2020, 103 pages) and then terminated on settlement (Paper 32/35, Apr. 20, 2021, PTAB Judges Zecher, Trock, Hudalla) with the express statement that "we have not yet decided the merits … This Order does not constitute a final written decision pursuant to 35 U.S.C. § 318(a)." Institution is a "reasonable likelihood" threshold, not a §102 finding; there is no estoppel and no merits ruling on any reference.

6. References encountered but not confirmed as citations of the '991 patent

I want to be explicit about one item that could be mistaken for a citation:

• GB 2463103 A (Skype Ltd.), "Video telephone call using a television receiver" — GB priority date 2008-09-05, published 2010-03-10. It surfaced in a Google Patents table rendered on the page for US 2007/0139514 A1 (Marley) alongside US 10,084,991 B2 — i.e., the pattern is a similar/related documents listing, not a confirmed entry in the '991's own citation record. Independent of provenance, it cannot be §102 art against the '991 claims: as a foreign published application it does not qualify under pre-AIA §102(e) (which reaches only U.S. patents and U.S. published applications), and its 2010-03-10 publication postdates both the 2008-09-25 foreign priority date and the 2009-06-04 U.S. filing date, so it is not §102(a) or §102(b) art either. Treat any citation of GB 2463103 A as non-anticipatory.

• The related Maxell family members (US 8,363,087; 9,124,758; 9,432,618; 9,723,268; 10,389,978; 10,911,719; 11,539,921) share the same specification and would have received broadly similar examiner citations. They are not prior art to the '991 patent — they are in the same §120 benefit chain and share the Sept. 25, 2008 priority. Any examiner-facing art list for the '991 patent should be expected to overlap with theirs, but I did not verify those lists either, and a same-family member can never be cited against its own sibling.

7. Bottom line

1. I could not retrieve the examiner-cited (56) references for the '991 patent. That gap should be closed from PatentCenter before this is treated as a complete prior-art list.
2. The only references I can confirm are "cited" by the patent itself are JP-A-5-56190 and JP-A-9-83983, both background art, neither anticipatory of any independent claim on its face.
3. The operative §102 prior art comes from Apple's defense, not from the patent's own face: U.S. Pat. No. 7,565,680 (Asmussen), filed 6/30/2000 — the sole reference asserted as a standalone §102(e) anticipation, against claims 1–5 and 8–12.
4. U.S. Pat. Nos. 7,548,255 (Bear) and Pub. Nos. 2007/0139514 (Marley), 2003/0041333 (Allen), and 7,046,268 (Saburi) are §102(a)/(b) references used in §103(a) combinations, targeting claims 1 and 8 (and, via Allen's restart teaching, claim 16).
5. No §102 or §103 determination on any of these references has ever been adjudicated. The IPR settled after institution (Apr. 20, 2021) with no final written decision; the district court case was dismissed with prejudice (Apr. 7, 2021) after Apple won partial SJ of non-infringement of claim 4 on the "TV receiver" construction.

Sources. Authoritative full text of US 10,084,991 (specification, abstract, definitions) as supplied; patents.google.com/patent/US10084991/en; claim text at insight.rpxcorp.com/patent/US10084991B2; Apple's Exhibit E2 invalidity chart, Docket 343-13, docketalarm.com/cases/Texas_Eastern_District_Court/5--19-cv-00036/Maxell_Ltd._v._Apple_Inc/docs/343/13.pdf; Apple's First Supplemental Invalidity Contentions, Docket 348-6, docketalarm.com/.../docs/348/6.pdf; PTAB Termination, Paper 32/35, IPR2020-00200, e.casetext.com/admin-law/maxell-ltd-14; IPR2020-00200 institution decision citation (Paper 11, Jul. 15, 2020) as listed at patents.justia.com/patent/12288221.

I'll gather the cited prior art references from the patent's record before analyzing.

Obviousness Analysis — U.S. Patent No. 10,084,991 (35 U.S.C. § 103)

0. What I could and could not verify (read first)

Consequence: the analysis below is built on (a) the patentee's own admitted prior art, (b) the family's cited references, and (c) the reconstructed claim 1. Claims 2–5 and 8–12 cannot be meaningfully assessed.

1. Governing framework

• Priority date: 2008-09-25 (JP 2008-246232; U.S. Ser. No. 12/457,257 filed 2009-06-04). The '991 is a straight continuation chain, so if the claims are supported by the 2009 disclosure, pre-AIA §§ 102/103 apply and prior art must predate 2008-09-25 (or qualify under pre-AIA § 102(e) on an earlier effective filing date).
• Graham/KSR factors: scope and content of the art; differences; level of ordinary skill; objective indicia. KSR Int'l v. Teleflex, 550 U.S. 398 (2007).
• Level of ordinary skill (proposed): a B.S. in EE/CS (or equivalent) with ~2–4 years in consumer video/television or videoconferencing systems, or equivalent experience — consistent with the "Level of Ordinary Skill" section Maxell briefed in E.D. Tex. (Dkt. 136).
• Claim construction caveat that matters here: the E.D. Tex. court construed "communication apparatus" as "videophone function-added TV receiver." That construction came from Apple's successful partial-SJM of non-infringement of claim 4 (iPhone/iPad are not TV receivers — no tuner, no ATSC/DVB/ISDB reception). For validity, that same construction helps the patentee's argument against non-TV art but is neutral-to-harmful against the TV-centric art below, because the cited art is itself TV receiver art.

2. Claim 1 — element breakdown used for the mapping

(Reconstructed; treat as provisional.)

Mapped against the specification, 1.4–1.5 is precisely the FIG. 6 "VOD Contents Watching" branch: inbound call → VOD automatic pause → decoder switched from VOD-use decode to videophone-use decode → camera/mic/encoder activated → on hang-up, VOD pause cancel and resume.

3. The prior art that can actually be used

3.1 Applicant-Admitted Prior Art (AAPA) — strongest and safest

The patent's own Background supplies two express admissions:

1. JP-A-5-56190 — "a telephone is communicatively connected by a signal transmission line to a TV receiver, wherein the TV receiver is arranged so that upon receipt of an incoming call at the telephone, the TV receiver displays a phone call arrival message on its display screen." This is 1.1/1.3/1.4's notification-while-viewing concept, admitted.
2. JP-A-9-83983 — a videophone having "a camera, microphone, loudspeaker and image display device," transmitting local camera/mic video and voice, receiving far-end video/voice, and performing "compression processing (encoding) for transmission while simultaneously performing expansion processing (decoding)" for display and reproduction. This is 1.0/1.2/1.3/1.5's videophone client, admitted.

The patent also admits the state of the art is "discrete devices which operate independently of each other" and states the problem itself: the user "must walk to a place at which this videophone is put" and later perform a manual hang-up. Under KSR, "any need or problem known in the field of endeavor at the time of invention … can provide a reason for combining the elements in the manner claimed."

3.2 Family front-page references (US 9,124,758 "(56) References Cited")

Foreign: JP 05-056190 (= the JP-A-5-56190 above), JP 05-236472, JP 08-289280, JP 09-083985, JP 2000184346, JP 2001086475, JP 2003-345510, JP 2006-20286, JP 2006-157610.

U.S. patents: 5,526,037 (Corjens et al.); 5,684,918 (Abecassis); 6,339,842 (Fernandez et al.); 6,529,742 (Yang); 7,593,031 (Root et al.); 8,013,938 (Shyu); 8,326,355 (Fujisaki); 8,676,273 (Fujisaki).

U.S. publications: 2001/0041053 (Abecassis); 2003/0031333 (Allen et al.); 2004/0123700 (Pan); 2007/0070188 (Shyu); 2007/0094691 (Gazdzinski); 2007/0139514 (Marley); 2007/0216760 (Kondo et al.); 2009/0013373 (Iizuka); 2009/0073253 (Lee); 2009/0079813 (Hildreth); 2009/0174762 (Takahashi); 2009/0251526 (Book); 2013/0033561 (Kwon et al.).

Two cautions I will not paper over:

• Identifier discrepancy — do not auto-correct. The specification cites JP-A-9-83983; the front page lists JP 09-083985. These are different serial numbers (83983 vs. 83985). I did not resolve which is correct, and the two should be treated as distinct identifiers until verified against JPO/Espacenet.
• Priority-date exposure. Several listed items plainly postdate 2008-09-25 as publications — e.g., US 2009/0174762 (Takahashi, pub. 2009-07-09), US 2013/0033561 (Kwon), and the Fujisaki patents (8,326,355; 8,676,273). These are usable only if they carry a pre-2008-09-25 effective filing date under pre-AIA § 102(e), or via a priority chain reaching back that far. If the Examiner cited any of these against the '991's claims without an earlier effective date, that is an error the patentee can exploit. Conversely, references like US 5,684,918 (Abecassis), US 5,526,037, US 6,339,842, US 6,529,742, JP 05-056190, JP 05-236472, JP 08-289280 and JP 09-083985 are comfortably pre-2008 and are the workhorses.

I did not retrieve the disclosures of most of these references, and I will not characterize them from memory.

4. Proposed grounds of rejection

Ground 1 — AAPA / JP-A-5-56190 in view of JP-A-9-83983 (and, for 1.1/1.4/1.5, a network content-delivery reference)

Teaches: 1.0, 1.2, 1.3, 1.5 (JP-A-9-83983 videophone codec + display + speaker; JP-A-5-56190 TV-side call-arrival notification).
Missing: 1.1's "digital information" delivered over a network and displayed before the call (VOD/IPTV streaming), and 1.4's pause of that content.

Rationale to combine (KSR):

• Same field, same problem. Both references are television/videophone premises. JP-A-5-56190 identifies exactly the problem the '991 solves (missed calls while watching TV) and solves half of it (notify). The other half (talk without leaving the couch) follows directly from integrating the JP-A-9-83983 codec into the TV.
• Predictable result. Combining a known display + speaker + codec with a known TV receiver yields nothing more than the expected sum of the parts — KSR's "predictable use of prior art elements according to their established functions."
• Design incentive / finite solutions. Placing the videophone in the TV's own screen and speakers is one of a small number of obvious options (see the patent's own discussion of the alternative "two-window" arrangement, and the FIG. 8 detachable-camera variant, both of which the patent treats as ordinary design choices).

Ground 2 — Ground 1 + paused/resumable networked content playback

For 1.1 and 1.4's "pause," the combination above plus any pre-2008 reference disclosing time-shifted/networked video with pause-and-resume would complete the picture. The patent itself treats pause/resume as a mechanical consequence: FIG. 6's "automatic pause" on inbound call and "pause cancel" on hang-up, and the Storage unit 17 HDD/SSD time-shift recording of a broadcast program "from its videorecording start part after the beginning of the above-stated phone call." Deferring/resuming a video presentation on an incoming event is a routine, well-understood design choice (pause-on-call is the same mental step as pause-on-remote). Candidate references requiring verification from the §3.2 list include US 5,684,918 (Abecassis) and US 2001/0041053 (Abecassis), both of which I flagged but did not read.

Ground 3 — Single-reference integration art

Any pre-2008-09-25 reference that discloses a single apparatus combining a TV tuner, a display, a videophone codec and an inbound-call-answering function would read on 1.0, 1.2, 1.3 and 1.5 directly, leaving only the server-delivered-content/pause limitations. Candidates from the list I did not verify: JP 05-236472, JP 08-289280, JP 2000184346, JP 2003-345510. I cannot assert their teachings.

5. Why a POSITA would have been motivated — consolidated

1. Express problem recognition in the admitted art. JP-A-5-56190 already addresses the "user doesn't notice the call while watching TV" problem — that reference's raison d'être is the motivation.
2. Elimination of the disclosed shortcoming. The specification's own complaint (walk to the videophone, then walk back to hang up) is a classic "known problem → obvious improvement" fact pattern.
3. Convergence trend. A 2008-era artisan faced an established trend of TV/telephony/network convergence (VOD, IPTV, set-top boxes, videophone-over-IP). KSR permits reliance on market and technical trends.
4. Finite, predictable design space. The patent's own FIGS. 1/8 (built-in camera vs. detachable camera), FIG. 13 (two-window), and FIG. 12 (dual decoder + echo canceller) are presented as implementational alternatives — the mark of predictable engineering, not invention.
5. Common ownership / same field of endeavor among the Japanese TV-makers' filings (JP 05-056190; JP 05-236472; JP 08-289280; JP 09-083985) strengthens the "artisans would have looked to one another" argument.

6. Anticipated patentee rebuttals and my assessment

7. Critical note on the E.D. Tex. result — it does not help validity

The only merits-adjacent court ruling in the record is Apple's partial summary judgment of non-infringement of claim 4, on the ground that the accused iPhone/iPad/iPod are not TV receivers under the "communication apparatus" = "videophone function-added TV receiver" construction. A narrow construction that defeats infringement simultaneously removes from the prior-art comparison any non-TV apparatus — but every reference discussed above is TV apparatus. So the construction does not create an obviousness shield. It does, however, mean that any reference a petitioner relies on that is not a TV receiver (e.g., a pure handheld videophone) must be mapped through the "videophone function-added TV receiver" lens, which is a real drafting burden.

8. Bottom line

• There is a strong, well-supported prima facie § 103 case against claim 1 on JP-A-5-56190 in view of JP-A-9-83983 (both admitted in the patent's own Background), provided the "pause the displayed network-delivered digital information" and "stop displaying the server information" limitations are met by an additional pre-2008-09-25 reference. That pause/resume element is where the case is won or lost.
• The case is materially stronger than usual because the patentee admitted both halves of the combination and the problem to be solved in its own specification.
• I cannot give claim-by-claim conclusions for claims 2–5 or 8–12, because I could not obtain their text.
• I cannot tell you what Apple actually argued in IPR2020-00200, only that the Board instituted (finding a reasonable likelihood as to at least one claim) and then terminated on settlement (Paper 35, 2021-04-20) with no Final Written Decision. That institution decision is a useful indicator of art quality but is not probative of merits, and I could not read it.
• Two housekeeping flags: (i) the JP-A-9-83983 (spec) vs. JP 09-083985 (front page) identifier mismatch is unresolved and must not be auto-corrected; (ii) several listed references (Takahashi, Kwon, Fujisaki) appear to postdate the 2008-09-25 priority date and are usable only with a verified earlier § 102(e) effective filing date.