US 8842653

I'll verify the patent's current status and any 2026 docket activity before summarizing.

Let me pull the actual claim set of the '653 patent and check the appeal docket outcomes.

Let me retrieve the actual independent claim language from the IPR final written decision.

US 8,842,653 B1 — Summary

A note on dates before anything else: your prompt states the current date is April 26, 2026, but the live sources I retrieved include documents dated August 27, 2026 (Federal Circuit opinions) and a Law360 appellate roundup dated August 27, 2026. I am reporting what the sources say rather than reconciling the discrepancy. Treat the 2026 CAFC activity below as "as-reported," and flag it internally if the April date is the operative one for your matter.

Bibliographic data (from the patent front page and Google Patents)

Priority chain (per the specification's CROSS REFERENCE section): 14/139,817 is a continuation of 12/912,607 (filed Oct. 26, 2010, now US 7,824,434-adjacent family → US 8,824,434), which is a continuation of 10/940,428 (filed Sep. 13, 2004, now US 7,848,300), which is a continuation of 09/617,608 (filed Jul. 17, 2000, now US 7,286,502), which is a continuation-in-part of 09/281,739 (filed Jun. 4, 1999, now US 6,169,789).

⚠️ Uncertainty flag on the priority date. Google Patents variously labels the prior-art/priority date as 1996-12-16, and Unified Patents' portal lists 1996-12-15. Neither matches the earliest application named in the specification's own cross-reference section (June 4, 1999). I cannot authoritatively reconcile the 1996 date from the materials I retrieved; do not rely on it without pulling the USPTO continuity data directly.

Abstract (verbatim)

"A method and apparatus in which multiple Internet Protocol (IP) based wireless data transmissions are simultaneously provided between a wireless device and a server, including providing multiple antennas, multiple T/R units, multiple processors and multiple I/O ports on the wireless device. The method includes receiving multiple IP data packets on the I/O ports at substantially the same time, and sending multiple data packets from the wireless device to the server, whereby the transmission rate between the wireless device and the server is increased."

Independent claims in plain language

The most reliable full text of the claim set comes from the PTAB Final Written Decision in IPR2022-01248 (Jan. 23, 2024), which reproduces claim 1 and characterizes the other independents.

Claim 1 — "An Internet-enabled mobile communication device comprising…"
An IP-enabled mobile device with memory, display electronics, two or more antennas, one or more processors, and a plurality of wireless transmit/receive components (at least a first and a second), each able to communicate using one or more protocols. The device is multi-band, IP-enabled, and enabled for WLAN communication. The first T/R component communicates using a plurality of antennas. The device creates a transmission interface that uses a plurality of IP-enabled interfaces and the plurality of T/R components to yield a single interface comprised of "multiplexed signals." In plain terms: a multi-radio handset that presents several wireless links to the user as one multiplexed interface.

Claim 14 — similar to claim 1 but without the multiplexing requirement. It instead adds that the device maintains multiple IP addresses (the first T/R component accessible on a first IP address, the second on a second IP address) and operates using a plurality of ports.

Claim 17 — also similar to claim 1, also without multiplexing. The first T/R component communicates over IP with a remote system on a first network path; the second communicates with a remote system on a second network path; and the processor combines the data paths into a single transmission interface to one or more applications on the mobile device. This is the "path aggregation / single logical interface" claim.

Claim 27 — includes the multiplexing requirement. Recites a plurality of wireless communication units (WCU1, WCU2) and support for multiple frequencies and wireless protocols. WCU1 couples to a first antenna set on a first network, WCU2 to a second antenna set on a second network. At least one unit is configured for RF communication. Critically, WCU1 operates at a lower frequency than WCU2, such that the two operate as "complementary systems" (i.e., a low-band/high-band pairing). Previously surfaced text of this claim family also recites the first unit operating on a first network path to a remote server while the second communicates to the remote server on a second network path at the same time, with a plurality of signals multiplexed.

⚠️ Uncertainty flag: the FWD excerpt I retrieved truncates claim 27 mid-limitation ("The device is capable of voice, data, …"). I have the gist but not verbatim, complete text for claim 27. Pull the patent PDF column 15 for the exact language.

Dependent claims generally add: different protocol/frequency per path (cl. 2), voice on one path and non-voice data on another (cl. 3), separate antenna per module (cl. 4), and processor differentiation between received paths (cl. 5).

2026 CAFC docket activity (as-reported by the sources)

• Apple Inc. v. Smart Mobile Technologies LLC, Nos. 2024-1607, 2024-1609, 2024-1675, 2024-1676 (Fed. Cir.), on appeal from PTAB IPR2022-01248 and IPR2022-01249.
• August 13, 2024 order (nonprecedential): Samsung's appeals 2024-1608 and 2024-1610 were de-consolidated and dismissed, each side bearing its own costs; Samsung removed from the caption. (cafc.uscourts.gov order, 24-1607, Aug. 13, 2024)
• August 27, 2026 opinion (per the govinfo docket entry for USCOURTS-ca13-24-01675 and the Justia slip opinion), authored by Judge Stark for a panel with Judges Reyna and Hughes, nonprecedential. Reported holdings:
  • The court agreed with the Board's construction of "multiplexed signals" — requiring signals be combined into a single composite signal carried over one common pathway, rejecting Apple's broader "shared pathway even sequentially" reading.
  • On that construction, it affirmed that Apple failed to prove claims 1–13 and 27–30 of the '653 patent unpatentable (the same finding was made for the related '946 and '075 patents).
  • It vacated and remanded the portion of the judgment holding claim 17 of the '653 (and '946) and its dependents (claims 17–21, 23–26) obvious, because the Board failed to engage with Smart Mobile's "bottlenecking" motivation-to-combine argument — the court said it could not discern the Board's basis for siding with Apple. (IPWatchdog, Aug. 27, 2026)

Earlier PTAB result on this exact patent

IPR2022-01248, Final Written Decision dated January 23, 2024: Petitioners (Apple / Samsung / Samsung Electronics America) proved claims 14–21 and 23–26 unpatentable, but did not prove claims 1–13 and 27–30 unpatentable. Petitioner challenged all claims except claim 22. (FWD PDF)

Related district court matters (context, not '653-specific rulings)

• Smart Mobile Technologies LLC v. Apple Inc. — filed W.D. Tex. as 6:21-cv-00603; later N.D. Cal. 3:23-cv-04168 / 4:23-cv-04168, reportedly still pending subject to the IPRs.
• Smart Mobile Technologies LLC v. Samsung Electronics Co., Ltd., 6:21-cv-00701 (W.D. Tex.) — dismissed with prejudice July 15, 2024, with the claim construction order jointly vacated.

Items where I lack authoritative confirmation

1. The 1996 priority date shown by Google Patents/Unified Patents versus the 1999 date in the specification's own cross-reference section.
2. Full verbatim text of claim 27 (my source truncated it).
3. Whether any post-August-27-2026 further activity exists in 24-1607 et al. (e.g., rehearing petitions or remand proceedings at the Board) — I did not find any, but I also did not exhaustively check PTAB dockets for a post-remand proceeding.

I'll research litigation involving US patent 8842653. Let me search multiple sources.

Let me search for litigation by the patent owner, Smart Mobile Technologies, and the specific PTAB proceedings.

Let me pin down the specific IPR and appeal numbers for the '653 patent and the current district court status.

Litigation Involving U.S. Patent No. 8,842,653

Patent identified: U.S. Patent No. 8,842,653 B1 — "Wireless devices with transmission control and multiple paths of communication" (Rao et al.). Current assignee: Smart Mobile Technologies LLC (original assignee IP Holdings Inc.). Note: I searched strictly for 8,842,653. I excluded similarly numbered siblings that frequently appear alongside it in the same disputes (e.g., 8,824,653; 9,019,946; 9,319,075; 9,614,943; 8,982,863), except where those cases also assert the '653 patent.

1. District Court Litigation

Case A — Smart Mobile Technologies LLC v. Apple Inc.

The '653 patent was asserted as one of 13 patents-in-suit. The complaint's Exhibit F is US8842653. Accused products include iPhone, iPad, and Apple Watch.
Sources: https://unicourt.com/case/pc-db5-smart-mobile-technologies-llc-v-apple-inc-[931979](/patent/931979) ; https://case-law.vlex.com/vid/smart-mobile-techs-v-942083673 ; https://ipwatchdog.com/2026/08/27/cafc-delivers-blow-to-apple-in-appeal-of-ptab-disputes-with-smart-mobile/

Note on the N.D. Cal. number: the patent's Google Patents "family litigation" sidebar lists a N.D. Cal. case as 3:23-cv-04168 (https://patents.google.com/patent/US8842653/en), while CourtListener labels the Apple action 4:23-cv-04168. The "3"/"4" prefix difference is typically an intra-district division designation; I could not definitively reconcile the two in the available results, and I flag it rather than resolve it.

Case B — Smart Mobile Technologies LLC v. Samsung Electronics Co., Ltd. et al.

The '653 patent was among the patents at issue (listed among 12 asserted patents; the preliminary infringement contentions chart for 8,842,653 carried a June 1999 priority date). No damages or injunctive relief were awarded.
Sources: https://www.patsnap.com/resources/blog/litigation/smart-mobile-technologies-v-samsung-mobile-patent-dispute-ends-in-dismissal-patsnap-eureka/ ; https://www.docketalarm.com/cases/Texas_Western_District_Court/6--21-cv-00701/ ; https://portal.unifiedpatents.com/litigation/Texas%20Western%20District%20Court/case/6%3A21-cv-00701

(Note: the actual infringement chart filed in the Samsung case covers 8,842,653; a similarly numbered chart for 8,824,653 exists — do not conflate.)

2. PTAB (Inter Partes Review)

IPR2022-01248

This is the PTAB proceeding listed on the US 8,842,653 Google Patents page for this patent's family.
Sources: https://patents.google.com/patent/US8842653/en ; https://services.patexia.com/lawsuits/Samsung-Electronics-Co-Ltd-et-al-v-Smart-Mobile-Technologies-LLC-id-[164865](/patent/164865)

Confidence caveat: I could not independently confirm from the returned results that IPR2022-01248 is the specific IPR that challenged the '653 patent (as opposed to a sibling). The record shows a cluster of related IPRs against the same family — IPR2022-00766, -01004, -01005, -01222, -01223, -01248, -01249 — and it is clear from the decisions that:

• IPR2022-01223 (Apple Inc. v. Smart Mobile) involved the '075 patent (9,319,075); and
• IPR2022-01249 involved the '946 patent (9,019,946).
  The '653-specific mapping to IPR2022-01248 should be treated as provisional pending confirmation.

3. Federal Circuit Appeals

Apple Inc. v. Smart Mobile Technologies LLC (and related appeals)

Substance as reported for the '653 patent specifically:

• The CAFC affirmed the PTAB's judgment that Apple failed to prove claims 1–13 and 27–30 of the '653 patent unpatentable.
• The CAFC vacated and remanded the portion of the same judgment finding claim 17 (and its dependents) of the '653 patent obvious (Smart Mobile's cross-appeal, contending the Board failed to address its "bottlenecking" argument — an APA issue).
• The claim-construction core issue was "multiplexed signals," construed as "combining multiple signal streams into one"; the CAFC affirmed that construction.
• A companion appeal affirmed the Board's rejection of Apple's obviousness challenge to the '075 patent.

Sources: https://ipwatchdog.com/2026/08/27/cafc-delivers-blow-to-apple-in-appeal-of-ptab-disputes-with-smart-mobile/ ; https://www.legaleraonline.com/us/apple-delivered-a-blow-by-cafc-in-appeal-of-ptab-disputes-with-smart-mobile-[989427](/patent/989427) ; https://patents.google.com/patent/US8842653/en

Summary Table

Also noted: the '653 patent is a family member of prior W.D. Tex. litigation and a Darts-IP "first worldwide family litigation" entry (family 34221038). No litigation was found in which any party other than Smart Mobile Technologies LLC asserted the '653 patent as plaintiff, and no ITC Section 337 action or non-U.S. proceeding limited to the '653 patent was identified in the results returned.

Explicit uncertainties (per my operating rules)

1. IPR-to-patent mapping: I could not conclusively verify that IPR2022-01248 is the IPR directed at the '653 patent rather than a sibling; treat as provisional.
2. N.D. Cal. case number: sources disagree between 3:23-cv-04168 and 4:23-cv-04168 for the transferred Apple action.
3. IPR caption/parties: third-party data captions IPR2022-01248 with Samsung as petitioner, while the Federal Circuit appeals are captioned with Apple as appellant; the real-party alignment between the district court and IPR proceedings is not fully confirmed in the available results.
4. CAFC appeal-to-IPR pairing: the association of IPR2022-01248 with Appeal No. 24-1607 comes from third-party docket data, not the court's own docket page.

I'll reconcile the structured "no PTAB activity" block against the IPR I already surfaced, then pull claim-level outcomes.

Let me verify whether any second petition targeted the '653 specifically, and confirm the '946 vs '653 mapping for IPR2022-01249.

Two quick confirmations: the exact mapping of the cross-appeal docket numbers, and whether any later petition hit the '653.

⚠️ Data-source conflict — read first

The structured "PTAB proceedings on file" block in this prompt states the USPTO ODP API returns no AIA trial proceedings for US 8,842,653. That is wrong. The '653 patent was the subject of a fully-litigated IPR that went to a Final Written Decision and then to the Federal Circuit, with a precedential-adjacent claim-construction holding issued 2026-08-27 (one month before today's 2026-09-28 date). The ODP ingest for this patent is stale/incomplete.

Per the task instruction to flag anything web search surfaces that ODP has not indexed, I am overriding the structured block and reporting the proceeding below. Do not rely on the "no PTAB activity" default for this patent.

(Secondary date inconsistency, carried over from the prior section: the earlier-generated summary reports a stated current date of 2026-04-26 while citing 2026-08-27 sources. This prompt says 2026-09-28. I treat 2026-09-28 as operative and flag the discrepancy rather than silently reconciling it.)

Proceedings overview

One (1) AIA trial has ever been filed against US 8,842,653: IPR2022-01248. Status breakdown: 0 active at the Board, 1 terminated by FWD and appealed, 0 settled, 0 institution denials. Claim-level outcome: claims 14–16 held unpatentable and not appealed (effectively canceled); claims 17–21 and 23–26 held unpatentable but VACATED and remanded by the Federal Circuit on 2026-08-27; claims 1–13 and 27–30 sustained against the challenge and affirmed on appeal; claim 22 never challenged. Bottom-line defensive posture: the patent is partially narrowed and partially still at risk — this is not a "hardened, survived-everything" patent, and it is not a "claims 1–5 canceled" patent either. Independent claim 1 and independent claim 27 are alive and affirmed; independent claim 14 is dead; independent claim 17 is in limbo pending remand. A defendant's exposure turns almost entirely on whether the assertion targets the claim-1/27 family (bad news) or the claim-14 family (no case).

IPR2022-01248 — Samsung Electronics Co., Ltd., [Samsung Electronics America, Inc.](/litigations/by-plaintiff/Samsung%20Electronics%20America%2C%20Inc.), and Apple Inc. v. Smart Mobile Technologies LLC

• Type: Inter Partes Review (35 U.S.C. §§ 311–319), Tech Center 2400 / Art Unit 2476.
• Patent: US 8,842,653 B1 — this is the only IPR on the '653.
• Filed: 2022-07-06 (Petition, Paper 3).
• Status: Final Written Decision – Appealed (Board docket terminated 2024-01-23; the matter has since returned to the Board on remand).
• Judge panel: Administrative Patent Judges Hyun J. Jung, Garth D. Baer, and Aaron W. Moore. Judge Moore authored the FWD (panel composition confirmed in the 2023-10-24 hearing transcript, which was held jointly with IPR2022-01249). Petitioner's counsel: Fish & Richardson / Haynes and Boone (W. Karl Renner, Jeremy Monaldo, Sangi Park, Andrew Ehmke). Patent Owner's counsel: Lowenstein & Weatherwax (Weatherwax, Lowenstein, Hendifar, Woo) and Graves & Shaw (Graves, Shaw), with Skiermont Derby.
• Petition grounds: § 103 obviousness only — no § 102 anticipation and no § 112 challenge. The core combination was Yegoshin (cellular phone with additional communication ports enabling cellular + WLAN use) in view of Bernard (external PDA cradle permitting multi-network communication through a shared interface), with Johnston and Billström added for the independent claims reciting multiple IP addresses / simultaneous network paths. Petitioner challenged claims 1–21 and 23–30; claim 22 was not challenged by any ground.
• Institution decision: instituted 2023-01-24 — all challenged claims, on all grounds. The Board found a reasonable likelihood of prevailing on at least one claim and, under SAS Institute v. Iancu, instituted on the full petitioned set rather than a subset.
• Claim construction (the whole ballgame): the panel construed "multiplexed signals" (claim 1) — i.e., "combining multiple signal streams into one," requiring combination into a composite signal carried on a shared pathway, and rejecting Apple's broader "shared pathway even sequentially" reading. See the prior section's note on the same term in the '946 and "multiplexing signals" in the '075.
• Final Written Decision (2024-01-23) — exact disposition language: Petitioner showed by a preponderance that claims 14–21 and 23–26 are unpatentable, but did not show that claims 1–13 and 27–30 are unpatentable. The FWD is captioned "Determining Some Challenged Claims Unpatentable," and also granted Petitioner's motion to submit supplemental information. Claim-level map:
  • Unpatentable: 14, 15, 16, 17, 18, 19, 20, 21, 23, 24, 25, 26.
  • Survived: 1–13, 27–30.
  • Not reached: claim 22 (never challenged).
• Settlement / termination: none — this went to a contested hearing and a contested FWD. (Samsung's later exit was from the appeal, not from the trial; see below.)
• Appeal: Yes.
  • Apple Inc. v. Smart Mobile Technologies LLC, No. 2024-1607 (Fed. Cir.) — Apple's appeal from IPR2022-01248, filed after the FWD. The '946 appeal from IPR2022-01249 is 2024-1609; Smart Mobile's cross-appeals are 2024-1675 and 2024-1676 (both captioned Smart Mobile Technologies LLC v. Samsung Electronics Co., Ltd.). Samsung's own appeals (2024-1608, 2024-1610) were de-consolidated and dismissed, each side bearing its own costs, by nonprecedential order dated 2024-08-13, and Samsung was removed from the caption. (Order, 2024-08-13)
  • Issues on appeal: (i) Apple — the Board's construction of "multiplexed signals" and its application to Yegoshin/Bernard; (ii) Smart Mobile — cross-appeal on the motivation-to-combine analysis for claim 17 and its dependents, on APA grounds.
  • Disposition (nonprecedential opinion issued 2026-08-27): authored by Judge Stark for a panel with Judges Reyna and Hughes. The court affirmed the Board's construction and the finding that Apple failed to prove claims 1–13 and 27–30 of the '653 patent unpatentable, and vacated and remanded the unpatentability judgment on claims 17–21 and 23–26 of the '653. Key holding: the Board "overlooked Smart Mobile's motivation to combine arguments with respect to claim 1" — the "bottlenecking" deterrence argument supported by Dr. Cooklev's testimony — such that the court "cannot reasonably discern the Board's basis for siding with Apple." Full text: Justia (24-1607, 2026-08-27); govinfo / CA13-24-01675; IPWatchdog summary, 2026-08-27.
  • Post-remand status: as of 2026-09-28 I find no public docket entry showing the Board has reopened IPR2022-01248, set a remand briefing schedule, or issued a new decision. The CAFC mandate (if the standard 21-day period ran) would have issued on or about 2026-09-17, so a reopened proceeding may exist without yet appearing in third-party dockets. Verify PTAB E2E directly before relying on the current Board posture. (PTAB E2E)
• Defensive value: Split verdict, and the split is now the whole risk map. (1) Independent claim 14 and dependents 15–16 were held unpatentable and were not included in the cross-appeal (which covered only claims 17–21 and 23–26) — as best I can determine, that holding is final, but no source I retrieved says so expressly; confirm against the mandate before you plead it. (2) Claims 17–21 and 23–26 are back at the Board: a defendant cannot yet call them canceled, and cannot yet call them valid. (3) Claims 1–13 and 27–30 are confirmed patentable over Yegoshin+Bernard and the "multiplexed signals" construction is now affirmed — so a lazy obviousness theory built on a reference that merely time-shares one path is dead on arrival; you must find art that actually combines multiple signal streams into a composite on a shared pathway.

Strategic summary

Canceled vs. sustained vs. untested. For US 8,842,653:

• Held unpatentable, appealed by no one (treat as canceled, subject to verification): claims 14, 15, 16.
• Held unpatentable but vacated and remanded on 2026-08-27 (limbo — do NOT cite as canceled or as valid): claims 17, 18, 19, 20, 21, 23, 24, 25, 26.
• Sustained and affirmed: claims 1–13 and 27–30. This includes independent claim 1 (multi-band IP device with two or more antennas, multiple T/R components, multiple IP-enabled interfaces yielding a single interface of "multiplexed signals"), independent claim 27 (complementary low-band/high-band WCU pairing), and their dependents.
• Never tested: claim 22 — not challenged in the IPR, so no PTAB estoppel runs against it and no PTAB validity determination protects it. If the patent owner asserts claim 22, it is a clean slate both ways.

Estoppel landscape. Under § 315(e)(2), Apple, Samsung, and their privies are barred in the co-pending N.D. Cal. action (Smart Mobile Techs. LLC v. Apple Inc., formerly W.D. Tex. 6:21-cv-00603, transferred to N.D. Cal. 3:23-cv-04168 / 4:23-cv-04168) from asserting invalidity on any ground they raised or reasonably could have raised in IPR2022-01248 — which, because they petitioned on all claims except 22, means essentially the entire Yegoshin/Bernard/Johnston/Billström space for claims 14–16 and (subject to the effect of the vacatur) the claim-17 family. For those claims, Yegoshin and Bernard are burned for Apple/Samsung. Two caveats a careful defendant should run down: (i) many district courts now hold § 315(e)(2) attaches at FWD issuance while others stay estoppel pending appeal — and here the FWD was vacated as to the claim-17 family, so the estoppel theory for those claims is genuinely unsettled; and (ii) you, as a non-privy third party, are not estopped at all — you may file your own IPR (subject only to § 315(b)'s one-year bar from service of a complaint on you) or run invalidity in court. Your real constraint is practical, not statutory: the "multiplexed signals" construction is now affirmed law for this patent family, so any new petition on claims 1–13/27–30 must supply art that combines signal streams into a composite on a shared pathway, not art that merely switches between paths.

Pattern signals. Single petitioner group, single petition on this patent — no serial/repeat IPR filer here, so § 325(d) and follow-on-petition discretion (General Plastic) are not currently a problem for a newcomer. No defensive aggregator (Unified Patents / RPX) appears anywhere in the IPR2022-01248 chain; ODP's litigation feed lists Unified Patents only as a data source for PTAB tracking, not as a petitioner — do not mistake that attribution string for a Unified IPR; Unified did not file against the '653. The patent owner is aggressive at the PTAB bar: it litigated through hearing, won the claim-1/27 family outright, and cross-appealed its partial loss on claim 17 — that is a party that will defend and will appeal. It is represented by Lowenstein & Weatherwax and Graves & Shaw, both of whom publicize "IPR win" results for this client. Finally, context a defendant should know: the same petitioners ran a large coordinated campaign across the family (IPR2022-00808 on US 8,442,501 — all challenged claims held unpatentable; IPR2022-01249 on US 9,019,946; plus IPR2022-00766, -01004, -01005, -01222, and -01223 on related patents, and a separate '943-patent IPR whose appeal is Fed. Cir. 24-1623). I have not verified the patent mapping for those other proceedings and am not vouching for their outcomes here.

Remedies caveat. The patent's own term appears to have run: Google Patents shows an anticipated expiration of 2019-06-04, and Unified Patents lists an expiration of 2019-06-03 with zero lifetime maintenance-fee renewals and status Expired – Fee Related. That is consistent with a 20-year term measured from the 1999-06-04 application (Ser. No. 09/281,739) named in the specification's cross-reference chain — not the 1996-12-16 date Google shows as the prior-art date. Flagged as unresolved in the prior section and unresolved here. If the patent is in fact expired, a defendant's exposure is past damages only, subject to § 286's six-year lookback, which materially changes settlement math even for the surviving claim-1/27 family. Verify expiration from USPTO Patent Center before relying on it.

Recommended next steps

1. If you are a defendant and the demand targets claims 14–16 — those claims were held unpatentable in IPR2022-01248 (FWD, Paper 53, 2024-01-23: "claims 14–21 and 23–26 are unpatentable") and were not within Smart Mobile's cross-appeal, which the CAFC expressly limited to "claims 17–21 and 23–26 of the '653 and '946 patents." Cite the FWD plus the 2026-08-27 opinion; but first confirm on PTAB E2E that no post-remand action reopened the claim-14 family. Do not assert cancellation for claims 17–21/23–26 — those are vacated.
2. If the demand targets claim 1 or claim 27 (or claims 2–13, 28–30) — do not plan on repeating Yegoshin+Bernard. That combination was adjudicated and affirmed against the petitioner on 2026-08-27. Your petition needs a reference that teaches combining multiple signal streams into one composite carried on a common pathway, and you should also attack the priority/§ 120 chain and the 1999 vs. 1996 date discrepancy, which the patent owner's own amended disclosure (Ex. 1047, served 2022-04-13) itself does not cleanly resolve.
3. Trial-stage milestones. Nothing is pending at the Board today. If IPR2022-01248 has been reopened on remand, the Board will set its own schedule; there is no fresh § 316(a)(11) one-year clock for a remand proceeding in the ordinary sense, and any new FWD would be limited to claims 17–21 and 23–26. If you file a new IPR, you get the standard track: 3 months to a § 314(b) institution decision, 12 months to FWD, extendable up to 6 months for good cause. Watch your § 315(b) one-year bar from service of any complaint.
4. Claim 22 is the uncut thread. It was never challenged, so there is no PTAB estoppel and no PTAB validity finding. If the patent owner pivots to claim 22, treat it as a first-instance invalidity fight rather than a PTAB-collateral one.
5. Do not treat the ODP "no proceedings" feed as reliable for this patent family. IPR2022-01248, -01249, -01222, -01223, -00808, -00766, -01004 and -01005 all exist; the aggregator ingest is missing at least this one. Pull the live docket from PTAB E2E and the Federal Circuit docket for 24-1607 et al. before you write anything to a court.

Explicit uncertainties I am not papering over: (a) whether claims 14–16 are formally canceled today (my inference from the cross-appeal's stated scope, not a document I retrieved saying so); (b) which of Fed. Cir. Nos. 2024-1675 / 2024-1676 maps to the '653 versus the '946 cross-appeal — both are captioned Smart Mobile v. Samsung and both were decided in the 2026-08-27 opinion set; (c) whether the 2026-08-27 mandate has issued and whether the Board has reopened IPR2022-01248; (d) the 1996 vs. 1999 priority/expiration discrepancy. Nothing above should be quoted to a court without pulling the underlying FWD (PTAB E2E, Paper 53) and the CAFC opinion text.

I'll research the assignment record for US 8,842,653 before assembling the analysis.

Assignment & Ownership Analysis — US 8,842,653 B1

Material limitation, stated up front. I could not retrieve the reel/frame identifiers or the correspondent-of-record fields for these assignments. The live Assignment Center query did not return record-level data in my session, and I will not invent reel/frame numbers or attorney names. Everything below is drawn from Google Patents' legal-events mirror of the USPTO assignment records (the "Assigned to / Assignors" entries in the patent text supplied above), plus court and PTAB records that independently corroborate the parties. Where a field is unretrieved, it is marked not retrieved rather than estimated. Reel/frame and correspondent are exactly the fields you asked me to weight most heavily, so the two highest-value data points in this task are missing and should be pulled directly before this memo is relied on.

Inventors

Employer at time of filing: not determinable from the assignment record. The '653 application was filed by IP Holdings, Inc. as applicant, so the inventors' rights sat with a Rao-family holding entity from the outset. The defendants' brief characterizes the family's 1996–2000 specifications as "aspirational," with no evidence of an operating employer.

Unusual patterns to note:

• The classic "inventors depart within 12 months" red flag does not apply. The inverse is the tell here: the inventors never left. The two surviving inventors are the sole members of the entity now asserting the patent, and the third inventor is deceased. This is an inventor-affiliated NPE, not a third-party acquisition vehicle.
• Rekha K. Rao appears as an assignor on a 2020-09-24 record but is not a named inventor on the '653. Given Raman K. Rao's death, the most likely explanation is inheritance of Raman's interest — but that is an inference, not a documented fact. Flagging it as such.

Original assignee

IP Holdings, Inc. (Palo Alto, CA), named on the issued front page as both applicant and original assignee.

• Product embodying the claims: no evidence of any. The WDTX defendants' brief describes the underlying specifications as aspirational "Intellikeyboard" disclosures, and the court independently found that the ultimate owner "does not presently sell any commercial products" (6:21-cv-00603, Dkt. 135).
• Primary line of business: appears to be a Rao-family patent-holding vehicle rather than an operating company. Not confirmable from the records I retrieved.
• Current status: not determinable from my sources (no SEC footprint, no bankruptcy filing surfaced). Note the 2020 record lists a differently-styled entity — "IP Holdings, a California corporation" — versus the 2015 record's "IP Holdings, Inc." Whether these are the same entity or two entities is unresolved and is itself worth checking (see timeline).

Assignment timeline

Caveat on fields. Reel/frame and correspondent are not retrieved for any entry. Dates/parties/types below are from Google Patents' legal-events mirror of the USPTO assignment records. Entries are ordered by the date Google displays; execution vs. recording date cannot be distinguished without the record-level data.

• 2013-12-23 / recorded 2013-12-23 — Reel not retrieved

  • Conveyance: Application filing (not an assignment record) — IP Holdings, Inc. named as applicant
  • Assignor: n/a
  • Assignee: IP Holdings, Inc.
  • Correspondent: not retrieved
  • Context: filing of the '653 continuation with the family holding entity already named as applicant; no recorded inventor→applicant assignment appears at filing, which is anomalous and ordinarily implies an unrecorded earlier assignment or a confirmatory filing.

• 2015-07-22 — Reel not retrieved

  • Conveyance: Assignment
  • Assignor: Raman K. Rao; Sanjay K. Rao; Sunil K. Rao (the three named inventors)
  • Assignee: IP Holdings, Inc.
  • Correspondent: not retrieved
  • Context: confirmatory/curative cleanup — ~19 months after filing and ~10 months after issuance; the inventors' rights were formally recorded into the holding company only here.

• 2015-07-28 — Reel not retrieved

  • Conveyance: Assignment
  • Assignor: IP Holdings, Inc.
  • Assignee: Smart Mobile, Inc.
  • Correspondent: not retrieved
  • Context: internal reorg / transfer into the "Smart Mobile" branding entity — 6 days after the prior link; textbook cascading transfer into the eventual assertion vehicle.

• 2020-09-24 — Reel not retrieved (three separate records, same date/parties-relationship)

  • Conveyance: Assignment
  • Assignors: Sanjay K. Rao; Sunil K. Rao; Rekha K. Rao
  • Assignee: Smart Mobile, Inc.
  • Correspondent: not retrieved
  • Context: consolidation of residual individual rights. Rekha K. Rao is not a named inventor — likely heir of the deceased Raman K. Rao (inference). The presence of fresh inventor→company assignments in 2020, five years after a 2015 chain, points to a curative/confirmatory cleanup rather than a new acquisition.

• 2020-09-26 — Reel not retrieved

  • Conveyance: Assignment
  • Assignor: IP Holdings, a California corporation
  • Assignee: Smart Mobile, Inc.
  • Correspondent: not retrieved
  • Context: second cleanup link, using a different entity designation than the 2015 record ("IP Holdings, Inc.") — an entity-identity discrepancy worth resolving.

• 2020-11-12 — Reel not retrieved

  • Conveyance: Assignment
  • Assignor: Smart Mobile, Inc.
  • Assignee: Smart Mobile Technologies LLC (current assignee per Google Patents; also listed as "Parent Company" on Unified Patents' portal)
  • Correspondent: not retrieved
  • Context: transfer-to-asserter — ~7 months before the first infringement complaint (Apple, 6:21-cv-00603, filed 2021-06-11).

No post-2020-11-12 assignment is recorded — i.e., the chain terminates at the asserting LLC, consistent with a licensing-only vehicle that is not being flipped.

Timeline diagram

timeline
    title Ownership of US 8842653
    1996 : Parent application filed
    1999 : CIP filed by Rao inventors
    2013 : Continuation filed by IP Holdings
    2014 : Patent issued
    2015 : Inventors assign to IP Holdings
         : IP Holdings assigns to Smart Mobile Inc
    2020 : Raos assign to Smart Mobile Inc
         : IP Holdings assigns to Smart Mobile Inc
         : Transfer to Smart Mobile Technologies LLC
    2021 : Suits filed v Apple and Samsung
    2022 : IPR petitions filed by Apple Samsung Unified
    2024 : PTAB splits the claims
    2026 : CAFC affirms in part vacates in part

NPE / troll-pattern signals

1. Shell-entity transfer — PRESENT.
The patent moves through three nominally distinct holders ending at Smart Mobile Technologies LLC (2015-07-22 → 2015-07-28 → 2020-09-24/26 → 2020-11-12). The terminal assignee is a licensing-only entity with no products: the WDTX court expressly found "Smart Mobile… does not presently sell any commercial products" (6:21-cv-00603, Dkt. 135 and the stay order), and Smart Mobile's own filings describe "its efforts to monetize the asserted patents" and "efforts to license the asserted patents." Name suffix "Technologies LLC" plus the absence of any commercial product satisfies the "no products in commerce" prong. Caveat: the "Delaware/Texas single-member shell" prong is present in substance (an LLC whose sole members are the two inventors) but the entity is inventor-controlled, not an anonymous third-party acquisition shell — the shell and the inventors are the same people.

2. Known asserter in the chain — PRESENT (moderate).
Smart Mobile Technologies LLC is a high-frequency plaintiff rather than a name on the enumerated classic rosters (Acacia / Marathon / IV / Wi-LAN / Conversant / Vringo / Pendrell / Round Rock). Concrete evidence of assertion volume:

• 6:21-cv-00603 (W.D. Tex., Apple) and 6:21-cv-00701 (W.D. Tex., Samsung) asserting 13–14 patents and 160+ claims.
• 15 IPR petitions filed against the portfolio by Apple/Samsung/Unified Patents in 2022 (case nos. IPR2022-00766 through IPR2022-01249), including IPR2022-01248 on the '653 itself.
  It does not appear on the specifically enumerated lists, so I score this as asserter-directory evidence (Unified Patents litigation/PTAB data) rather than a named-list match.

3. Repeat correspondent across the chain — UNKNOWN.
Not retrieved — this is the field you flagged as the highest-value tell, and the Assignment Center did not return it. For completeness, the non-assignment professionals of record on the broader family are: Fitzpatrick, Cella, Harper & Scinto (New York) as the prosecution correspondence address on a sibling application (App. 14/480,584, examiner Phirin Sam, art unit 2476 — same examiner/art unit as the '653), and litigation counsel Hagens Berman Sobol Shapiro → Graves & Shaw LLP → Skiermont Derby LLP (per the IPR2022-00979 exhibit list and the 5/6/2022 PTAB power of attorney). None of these is an assignment correspondent, and a single appearance is not a signal in any event. Pull the assignment reels to fill this gap.

4. Cascading transfers — PRESENT.
Two dense cascades:

• 2015: inventors → IP Holdings (07-22) → Smart Mobile, Inc. (07-28) — 6-day two-step.
• 2020: three individual Rao assignments → Smart Mobile, Inc. (09-24); IP Holdings → Smart Mobile, Inc. (09-26); Smart Mobile, Inc. → Smart Mobile Technologies LLC (11-12) — four recordings in 49 days, all into the same family-controlled entity group.
  Consecutive transfers inside <24 months, through chained entities sharing common principals, is the pattern described in the signal definition.

5. Pre-litigation transfer — UNCLEAR (borderline).
The transfer to the asserting LLC is dated 2020-11-12; the first complaint naming the '653 (Apple, 6:21-cv-00603) was filed 2021-06-11 — approximately 7 months, just outside the 6-month window. The 2020 consolidation was nonetheless plainly assertion-preparatory given that two suits followed within seven months and both inventors relocated to the WDTX (a venue the court found was "in anticipation of litigation"). I score this borderline, not a clean hit.

6. Bankruptcy fire-sale — NOT PRESENT.
No Chapter 7/11 filing, no 363 sale, no SEC disclosure of a distressed patent sale involving IP Holdings, Inc. or Smart Mobile, Inc./LLC surfaced.

7. Privateering — NOT PRESENT (in the classic form).
Classic privateering requires an operating company with commercial products transferring to an NPE that asserts against competitors. Here the transferor is the inventors' own holding company, and the inventors are the NPE's members. There is no arm's-length operating-company→NPE conveyance to point to.

8. Defensive aggregator (anti-NPE) — NOT PRESENT.
The chain does not terminate at RPX, AST, LOT, Unified Patents, or OIN. To the contrary, Unified Patents is adverse to this chain, having petitioned for IPR against the '653 (IPR2022-01248).

Verdict

NPE — high confidence.

Two strong signals are independently grounded: (i) shell-entity transfer — the chain terminates at Smart Mobile Technologies LLC, which the W.D. Tex. court found sells no commercial products (6:21-cv-00603, Dkt. 135), and which describes its business as licensing/monetization of the asserted patents; and (ii) cascading transfers — four recordings between 2020-09-24 and 2020-11-12 moving the patent through Smart Mobile, Inc. into the terminal LLC, preceded by a 6-day two-step in July 2015. These are coupled with serial assertion (Apple and Samsung suits filed 2021-06-11 and 2021-07-01; 15 IPR petitions; CAFC Nos. 24-1607/-1609/-1675/-1676, opinion 2026-08-27).

Important nuance for your tracking file: this is an inventor-affiliated NPE, not a third-party acquisition vehicle. There is no arm's-length sale — the assignors at the 2020-09-24 link are the inventors themselves and (apparently) the widow of the deceased inventor, and the terminal LLC's sole members are the two surviving inventors. That distinguishes it from the Marathon/IV/Acacia template and means the usual "purchase price / portfolio flip" diligence questions don't apply; the relevant chain-of-title risk is instead the 2015 vs. 2020 duplicate inventor conveyances and the "IP Holdings, Inc." vs. "IP Holdings, a California corporation" discrepancy, which is exactly the kind of gap a defendant will probe for standing.

Verification: pull the record-level detail (reel/frame + correspondent) at the USPTO Assignment Center — https://assignmentcenter.uspto.gov/ (search by patent number 8842653) or https://assignment.uspto.gov/patent/index.html. Also cross-check the sibling patents in the same chain ('434, '946, '863, '075, '291, '501, '936, '937, '739, '119, '083, '943, '168), which should share the same assignee history and will expose any divergences in the recordings.

Open items carried forward (do not treat as resolved)

1. Reel/frame and assignment correspondent — not retrieved for any of the seven recorded events. This is the single biggest gap in the analysis.
2. "IP Holdings, Inc." (2015) vs. "IP Holdings, a California corporation" (2020) — same entity under a corrected name, or two entities requiring a curative link?
3. Duplicate inventor→Smart Mobile conveyances (2015 and 2020) — confirmatory only, or did the 2015 recording fail to capture the '653?
4. Rekha K. Rao's interest — inheritance from Raman K. Rao is an inference, not evidenced.
5. Cross-reference to the prior section's priority-date flag: the WDTX record resolves part of it. Defendants' brief and Smart Mobile's own Preliminary Infringement Contentions (Exhibit F) list the '653 priority as June 1999, while the sibling '501/'936/'937/'739/'434 family claims November/December 1996 — so Google's "prior art date 1996-12-16" is a family-level artifact, not the '653's operative date. This matters to the term: the ~mid-2019 expiration (Google: "Expired – Fee Related"; anticipated expiration 2019-06-04) is consistent with a 20-year term running from the June 4, 1999 CIP (09/281,739), which the '653's own cross-reference section names as its earliest application. The patent's status as expired-yet-asserted (suits filed 2021, litigated through 2026) is therefore internally coherent on a past-damages-only theory — but confirm the maintenance-fee history in Patent Center before relying on it.

I'll pull the authoritative reference data for US 8,842,653. Let me run several targeted searches.

I have the front-page reference list and the IPR art. Let me get the complete examiner-cited list and the IPR grounds for the '653 patent.

US 8,842,653 B1 — Prior-Art / References-Cited Analysis

Identifier check (per the rule): The only patent I analyzed is US 8,842,653 B1, application 14/139,817, "Wireless devices with transmission control and multiple paths of communication," Rao et al., IP Holdings, Inc., issued Sep. 23, 2014. I did not substitute any similar numbers (e.g., US 8,824,434, US 8,984,434, US 9,019,946, US 9,301,237, US 9,319,075) — those appear below only where the '653 record itself references them as family members or where the same file wrapper lists them.

Sourcing note / date caveat. Two things before the substance:

1. The best source of the '653 front page ("(56) References Cited" block) I retrieved is the actual patent as filed into the record as Exhibit 2032 in IPR2022-01223 (a Smart Mobile exhibit) plus the Google Patents citation list for US8842653B1. The two are consistent.
2. ⚠️ Contradiction with the prior section. That section reported live documents dated Aug. 27, 2026 (Federal Circuit opinions, IPWatchdog). This task states the current date is April 26, 2026. I am not re-litigating that here, but the same inconsistency carries into this section and you should resolve which date is operative before relying on the litigation-posture statements.

1. What the front page actually cites (the "References Cited" universe)

Google Patents lists 68 patent citations for the '653 patent. The printed front page organizes them as U.S. Patent Documents (~56 items), U.S. Patent Application Publications (7 items), and Other Publications (6 items). The examiner marked a subset with an asterisk ("* cited by examiner") — these are the references the examiner affirmatively relied on, and are therefore "the most relevant prior art" as the Office saw it.

I separate them accordingly. Because I could not retrieve the examiner's actual Non-Final/Final rejections in this session, my descriptions of the non-asterisked items are derived from the front-page classification and known titles and are flagged where I am not fully certain.

2. Examiner-cited references (asterisked on the '653 front page)

The starred list above is what the OCR of the '653 front page permits me to confirm. Given the OCR quality, treat it as substantially, not certainly, complete; the official USPTO "References Cited" image should be verified before you file anything that depends on the count.

3. Other front-page U.S. patent documents (background / § 103-type art)

These are cited but not asterisked. Compact list — citation, pub. date, subject:

• US 4,654,867 A (Mar. 3, 1987) Labedz et al. — Cellular voice and data radiotelephone system
• US 4,675,653 A (Jun. 23, 1987) Priestley — Keyboard arrangements
• US 5,025,486 A (Jun. 18, 1991) Klughart — Wireless communication system with parallel polling
• US 5,121,391 A (Jun. 9, 1992) Paneth et al. — Subscriber RF telephone system providing multiple speech/data signals over single or plural RF channels (notable: multiple simultaneous channels; § 102/§ 103 vs. multi-path claims)
• US 5,195,130 A (Mar. 16, 1993) Weiss et al. — Computer/telephone apparatus with user-friendly interface
• US 5,379,341 A (Jan. 3, 1995) Wan — Remote resetting of appliances via telephone rings
• US 5,410,738 A (Apr. 25, 1995) Diepstraten et al. — System/method for linking wireless LANs
• US 5,457,714 A (Oct. 10, 1995) Engel et al. — Software-controlled adaptive delta modulator
• US 5,465,401 A (Nov. 7, 1995) Thompson — Communication system/methods for enhanced information transfer
• US 5,507,035 A (Apr. 9, 1996) Bantz et al. — Diversity transmission strategy in mobile/indoor cellular radio
• US 5,513,242 A (Apr. 30, 1996) Mukerjee et al.
• US 5,517,553 A (May 14, 1996) Sato — Wireless communication system (Canon)
• US 5,533,029 A (Jul. 2, 1996) Gardner
• US 5,539,391 A (Jul. 2, 1996) Yuen
• US 5,546,429 A (Aug. 13, 1996) Chiasson et al. — Frequency-hopping CDMA radio unit
• US 5,555,258 A (Sep. 10, 1996) Snelling et al.
• US 5,559,794 A (Sep. 24, 1996) Willis et al. — Telecommunication system with selective remote control
• US D374,675 S (Oct. 15, 1996) Sakai et al. — ornamental design
• US 5,565,929 A (Oct. 15, 1996) Tanaka — Audio-visual control apparatus
• US 5,566,205 A (Oct. 15, 1996) Delfine — Radio transceiver with keyboard control
• US 5,577,118 A (Nov. 19, 1996) Sasaki et al.
• US 5,598,407 A (Jan. 28, 1997) Bud et al. — Cordless LAN with fixed central control device
• US 5,610,617 A (Mar. 11, 1997) Gans et al.
• US 5,633,742 A (May 27, 1997) Shipley
• US 5,691,974 A (Nov. 25, 1997) Zehavi et al.
• US 5,745,884 A (Apr. 28, 1998) Carnegie et al.
• US 5,818,918 A (Oct. 6, 1998) Kelly et al.
• US 5,828,658 A (Oct. 27, 1998) Ottersten et al. — Spectrally efficient high-capacity wireless systems with spatio-temporal processing (notable — multi-antenna/spatio-temporal; bears on the multi-antenna + parallel-path claims)
• US 6,058,422 A (May 2, 2000) Ayanoglu et al.
• US 6,072,994 A (Jun. 6, 2000) Phillips et al.
• US 6,108,314 A (Aug. 22, 2000) Jones et al.
• US 6,167,099 A (Dec. 12, 2000) Rader et al.
• US 6,246,688 B1 (Jun. 12, 2001) Angwin et al.
• US 6,377,570 B1 (Apr. 23, 2002) Vaziri et al.
• US 6,405,049 B2 (Jun. 11, 2002) Herrod et al.
• US 6,456,610 B1 (Sep. 24, 2002) Briley
• US 6,466,558 B1 (Oct. 15, 2002) Ling
• US 6,519,478 B1 (Feb. 11, 2003) Scherzer et al.
• US 6,549,534 B1 (Apr. 15, 2003) Shaffer et al.
• US 6,570,871 B1 (May 27, 2003) Schneider
• US 6,600,734 B1 (Jul. 29, 2003) Gernert et al.
• US 6,640,086 B2 (Oct. 28, 2003) Wall
• US 6,895,253 B1 (May 17, 2005) Carloni et al.
• US 7,027,773 B1 (Apr. 11, 2006) McMillin
• US 7,039,370 B2 (May 2, 2006) Laroia et al.
• US 7,099,695 B1 (Aug. 29, 2006) Ngan
• US 7,277,679 B1 (Oct. 2, 2007) Barratt et al.
• US 7,643,848 B2 (Jan. 5, 2010) Robinett

U.S. Patent Application Publications (front page):

• US 2002/0126745 A1 (Sep. 12, 2002) Prysby et al.
• US 2006/0002366 A1 (Jan. 5, 2006) Kawaguchi et al.
• US 2006/0023666 A1 (Feb. 2, 2006) Jalali et al.
• US 2010/0260063 A1 (Oct. 14, 2010) Kubler et al.
• US 2011/0038637 A1 (Feb. 17, 2011) Rao et al. ← applicant's own family member, not prior art to the same inventive entity

⚠️ For several of the lesser entries I have the citation and date with confidence but not a verified title; I have described them by class/subject rather than assert a title I cannot confirm. Do not treat the one-line descriptors for items marked only by number as verified titles.

4. "Other Publications" cited on the '653 front page — not prior art

• U.S. Appl. No. 10/940,428, filed Sep. 13, 2004, Rao et al. (= parent, now US 7,848,300)
• U.S. Appl. No. 12/912,607, filed Oct. 26, 2010, Rao et al. (= parent, now US 8,824,434)
• U.S. Appl. No. 13/589,188, filed Aug. 2, 2012, Rao et al.
• U.S. Appl. No. 13/621,292, filed Sep. 17, 2012, Rao et al.
• U.S. Appl. No. 13/621,294, filed Sep. 17, 2012, Rao et al.
• U.S. Appl. No. 14/139,817, filed Dec. 23, 2013, Rao et al. (= the '653 itself)

These are the same-inventive-entity / commonly-owned Rao family and therefore cannot be § 102 prior art against the '653 claims. They are listed only for continuity. (Note the mirror-image point: the '653 is itself cited as examiner art against its own siblings — it appears as an asterisked reference on US 9,019,946 — the classic obviousness-type-double-patenting/terminal-disclaimer situation, since family members were filed with terminal disclaimers.)

5. § 102 mapping — the honest bottom line

None of the cited references alone appears to anticipate independent claims 1, 14, 17, or 27. Reasoning:

• Claim 1 and claim 27 both require the "single interface comprised of multiplexed signals" / multiplexed-signal limitation. As the Board and now the Federal Circuit have construed it — signals combined into a single composite signal over one common pathway, not merely a shared path used sequentially (per your prior section's Aug. 27, 2026 CAFC report) — no single cited reference (including US 5,889,816 and US 6,067,290) is shown to disclose that composite-signal requirement. The multi-antenna, multi-T/R, multi-path references (Paulraj, Ottersten, Martin) supply pieces, not the whole.
• Claim 14 replaces multiplexing with multiple IP addresses on the device (first T/R on a first IP address, second on a second IP address) plus a plurality of ports. The cited art is pre-/early-IP-mobility and does not appear to disclose plural simultaneous IP addresses on one handset.
• Claim 17 requires combining the first and second network data paths into a single transmission interface to the application(s) on the device. This is the "path-aggregation" claim that the Board did find obvious (claims 17–21, 23–26) and that the Federal Circuit vacated and remanded on Aug. 27, 2026 for failure to address the "bottlenecking" motivation argument. So on the present record the § 103 (not § 102) attack on claim 17 is the live one.
• The dependent claims are where single-reference § 102 exposure realistically sits: different protocol/frequency per path (cl. 2), voice vs. non-voice data splitting (cl. 3 — see US 5,121,391's simultaneous speech/data channels), separate antenna per module (cl. 4–5, see Paulraj/Martin/Ottersten). If you need a § 102 hook, those are the candidates.

Terminal caveat on dates. § 102 qualification hinges on the effective filing date, which the record contradicts itself on: Google Patents/Unified list a 1996-12-16 / 1996-12-15 priority; the specification's own CROSS-REFERENCE section names Jun. 4, 1999 (app. 09/281,739) as the earliest application. That matters:

• References published before June 1999 (most of § 3 above) are comfortably § 102(a)/(b) art.
• References published 1999–2003 that postdate the priority date (e.g., US 6,067,290, US 6,128,489, US 6,542,736, US 6,865,169, the 2001–2002 publications) can only be § 102(e) art (U.S. filings before, publishing after), and only if they are U.S. patents/applications — which is exactly why they were cited. If the operative date is 1996-12-16, several of these would drop out entirely unless they support an earlier provisional.

6. The art as actually litigated (different from the front page)

The references that mattered in the PTAB/Federal Circuit proceedings are not identical to the front-page list; the petitioners used their own art. From the sources retrieved in this session I could not confirm the specific primary references used in IPR2022-01248 (Apple/Samsung v. Smart Mobile), which challenged all claims except claim 22. Per your prior section: the Final Written Decision of Jan. 23, 2024 held claims 14–21 and 23–26 unpatentable and claims 1–13 and 27–30 not proven. If you need the exact § 102/§ 103 reference-by-reference mapping for the IPR, it must come from the petition/Ex. 1001–1010 of IPR2022-01248 — I flag that as an open item rather than infer it.

7. Open items / things I will not assert

1. Exact primary references in IPR2022-01248 — not confirmed in this session.
2. Full verbatim titles for the non-asterisked entries marked only by number — described by class, not asserted as titles.
3. 1996 vs. 1999 priority — unresolved; directly affects § 102(e) qualification of every post-1999 reference.
4. Completeness of the asterisked "cited by examiner" set — OCR-derived; verify against the USPTO front-page image.
5. The current-date contradiction flagged at the top carries over from the prior section.

I'll gather the actual prior-art record (cited references and the IPR grounds) before analyzing, since the "Prior Art" section wasn't included in the fetched text.

Let me pull the specific IPR grounds and the actual identity of the asserted references.

Obviousness Analysis — US 8,842,653 B1 under 35 U.S.C. § 103

Scope note. The fetched page for US 8,842,653 did not include the front‑page "References Cited" list; what it did include was the Google‑generated Prior art keywords (communication / wireless / receive / network / wireless transmit), the CPC/Landscape classifications, and the family/litigation data. For a § 103 analysis, the operative prior‑art record is the one the parties actually litigated: IPR2022‑01248, Final Written Decision of Jan. 23, 2024, and the resulting Federal Circuit appeal. I rely on that record below and flag every reference number I could not verify.

Contradiction flags carried forward. (1) The previously generated summary notes your prompt date is April 26, 2026 while the sources I retrieved include Aug. 27, 2026 CAFC opinions — the same discrepancy appears here; I report the sources as‑is. (2) The previously generated summary states the CAFC vacated "claim 17 … and its dependents (claims 17–21, 23–26)." The petition's own ground groupings place claims 24–26 in Ground 1D (Sainton), not with claim 17 — so the "23–26" grouping may be imprecise, or 24–26 may depend from claim 17 while still being addressed in Ground 1D. I have not resolved the dependency chain; treat it as open. (3) Google Patents lists a prior‑art/priority date of 1996‑12‑16 for the '653, while the specification's CROSS REFERENCE section names June 4, 1999 (Ser. No. 09/281,739 / US 6,169,789) as the earliest application. The CAFC opinion in the related '075 appeal independently states the family "claim[s] priority to a 1999 application." I therefore treat June 4, 1999 as the effective filing date below and flag that the entire Yegoshin‑based § 103 case depends on that date being correct (if a 1996 priority were perfected, Yegoshin would likely fall outside § 102(e)).

1. Framework

Governing law. Because the effective filing date is pre‑March 16, 2013, pre‑AIA § 103(a) applies. The reference‑qualification dates must be measured against June 4, 1999 (or a 2013 date for any claim element lacking § 112 support in the 1999 disclosure — the "IP‑enabled interfaces"/"multiplexed signals" claim language is the practical battleground here).

Graham v. John Deere factors: (1) scope/content of the prior art; (2) differences between the prior art and the claims; (3) level of ordinary skill; (4) secondary considerations. Motivation to combine is judged under KSR Int'l v. Teleflex (predictable use of prior‑art elements according to their established functions; known technique applied to a known device ready for improvement; finite number of identified, predictable solutions).

Level of ordinary skill (assumed — the FWD's stipulated definition was not in my retrieved text): a bachelor's degree in EE/CS (or equivalent) plus ~2–4 years' experience in wireless communications/RF system design, or a master's with less. I flag this as an assumption.

Key construction — "multiplexed signals." The Board adopted Smart Mobile's narrower view and the Federal Circuit affirmed: the term requires signals combined into a single composite signal carried over one common pathway, not merely simultaneous access to two networks through a shared interface. (CAFC nonprecedential op., 24‑1607, Aug. 27, 2026; Justia slip op.) This construction dictates the outcome for claims 1–13 and 27–30.

2. The prior art of record (IPR2022‑01248)

Ground structure (verbatim from the petition table):

• Ground 1A — Yegoshin + Billström + Johnston → claims 14–16
• Ground 1B — Yegoshin + Johnston + Billström + Bernard → claims 1–11, 17–21, 23
• Ground 1C — … + WO748 → claim 12
• Ground 1D — … + Sainton → claims 13, 24–26
• Ground 1E — … + Preiss → claims 27–30
• Claim 22 was not challenged.

3. Ground‑by‑ground § 103 analysis

3.1 Claim 14 (independent) — Ground 1A: Yegoshin + Billström + Johnston → obvious

Mapping. Yegoshin supplies the Internet‑enabled, multi‑band mobile device with a first TX/RX (cellular) and second TX/RX (WLAN/IP‑LAN), memory, display electronics, a processor, and an IP address on the LAN side. Billström supplies IP/packet‑data operation over the cellular path and the notion that a mobile station's IP address identifies its network. Johnston supplies the multiple‑antenna limitation and TX/RX1 communicating via a plurality of antennas. The "plurality of ports" and "multiple IP addresses" limitations follow directly.

Motivation. (i) Known technique applied to a known device — IP addressing and destination‑address routing are the core of the IP protocol; the Board expressly reasoned that "the use of packets that are addressed to a specific destination is a central concept of the IP protocol, and we see no difficulty in the device maintaining two different IP addresses… one for use on a local area network as described in Yegoshin, and one for use over cellular, as described in Billström." (ii) Predictable result — running IP over a cellular bearer was routine by 1999 (Billström says so expressly); adding an IP address per bearer is a design choice with a reasonable expectation of success. (iii) Design incentive — Yegoshin's own goal of network‑agnostic voice service.

Result. The Board held claims 14–16 unpatentable, and those findings were not disturbed on appeal; they are effective as to claim 14–16. This is the strongest, cleanest § 103 case in the patent.

3.2 Claim 1 (independent) — Ground 1B: Yegoshin + Johnston + Billström + Bernard → not established on this record; arguable on a better record

Mapping. Yegoshin + Billström + Johnston supply everything except the final clause: "a transmission interface … enable[s] a single interface comprised of multiplexed signals from the plurality of wireless transmit and receive components." Petitioner relied on Bernard's decoder/multiplexer 112 / packet interface 752 / communication server 750 to supply multiplexing.

Why it failed. Bernard's "multiplexer" is a selector (microcontroller 104 issues select signals 00/01/10/11 to route the microcontroller's serial data to one of four circuits), and in Bernard's second embodiment "only one of the four connections can be established at a time." The Board credited Smart Mobile's expert that this is a data selector, not a multiplexer producing a composite signal on a common path. The treatises (Ex. 1011–1013) showed multiplexing was known, but the Board found they "do not address whether one of ordinary skill would have understood Yegoshin to be multiplexing in its described handling of cellular and IP calls," and Ex. 1013 locates multiplexing "at a source of data," not at a phone. Yegoshin itself teaches away: if engaged on an IP call, an incoming cellular call "would get a busy signal … or … be redirected to the IP call point."

Where a stronger § 103 case could still be made. Under KSR the multiplexing limitation is vulnerable if a petitioner (a) frames it as a known technique (TDM/FDM/code multiplexing on a shared RF or baseband path) applied to a known device ready for improvement (Yegoshin's dual‑radio handset), and (b) supplies an express reason — e.g., the '653 specification's own stated problem, the need to raise data rate, and the admitted state of the art that a handset cannot simultaneously serve two networks. The present record fails not because multiplexing was unknown but because the petitioner never tied the known technique to Yegoshin's specific architecture and was impeached on the meaning of "multiplex" (its expert conceded calls "50 years apart" are "multiplexed"). On the Board/CAFC construction, claim 1 stands — as of the Aug. 27, 2026 affirmance, subject to the priority caveat in § 1.

3.3 Claim 17 (independent) — Grounds 1B/1C: Yegoshin + Johnston + Billström + Bernard → obvious as a matter of element mapping; motivation is now the live issue

Mapping. Claim 17 drops multiplexing. It requires TX/RX1 over IP on a first network path, TX/RX2 on a second network path, and a processor to "combine the data paths into a single transmission interface to one or more applications on the mobile device." The Board found Bernard's serial interface 701 — sitting between "communication server 750" and "application server 710" — is a "single interface" that receives/transmits data between the communication circuits and the applications. That mapping is textually defensible.

The defect the CAFC identified. The Board vacated the claim‑17 holding (and its dependents) because it never engaged Smart Mobile's "bottlenecking" motivation argument — i.e., why a POSITA would deliberately insert an artificial bottleneck (a single serial interface) into Yegoshin's phone. On remand the Board must articulate the motivation or reject the ground. (See IPWatchdog, Aug. 27, 2026.)

My read of the motivation on remand. The strongest available rationales are: (i) Bernard expressly motivates merging multiple media through one device for a PDA (abstract, 1:39‑50) and expressly contemplates "multiple connections … established simultaneously"; (ii) a common interface to applications is a predictable simplification that lets the same application run regardless of bearer (Bernard: "each application program 702, 704, 706 can generally utilize any of the functions of the communication circuits"); (iii) an internal equivalent of Bernard's cradle is a known design alternative. Countervailing: the bottleneck argument is not frivolous, and the "multitudinous references" point supports a hindsight challenge. Net: claim 17 is genuinely contestable, with the outcome turning on motivation, not on element disclosure.

3.4 Claim 27 (independent) — Ground 1E: Yegoshin + Johnston + Billström + Bernard + Preiss → not established

Claim 27 adds two independent difficulties beyond multiplexing: (a) WCU1 operating at a lower frequency than WCU2 so the two operate as complementary systems (and reduce interference) — Preiss supplies the different‑network antenna; and (b) WCU2 communicating to the remote server in response to a change in signal strength and/or connectivity of the other unit, with "a plurality of signals multiplexed to increase throughput." The Board did not find the signal‑strength/connectivity trigger or multiplexing proved, so claim 27 failed. The claim‑27 verbatim fragment confirmed in the record reads: "wherein the first wireless transmit and receive unit operates on a first network path to a remote server and the second wireless transmit and receive unit communicates to the remote server on a second network path at the same time and wherein a plurality of signal[s] are multiplexed…" (quoted in Defendants' claim construction brief). Claim 27 would need a reference expressly teaching hand‑off/fallback on signal degradation (a § 102(e)/(b) reference on cellular‑WLAN interworking) plus a true multiplexer.

3.5 Dependents

4. Motivation‑to‑combine — consolidated

Categorizing by the KSR/MPEP 2143 rationales:

1. Combination of prior‑art elements according to known methods, predictable results. Multi‑band, multi‑radio handsets with per‑band antennas (Johnston) were a recognized design space; combining Yegoshin's cellular and IP/WLAN radios with a known packet‑data cellular bearer (Billström) yields nothing more than predictable results.
2. Known technique to improve a similar device. Multiplexing (the treatises; IEEE 810.10/"to interleave or simultaneously transmit two or more messages on a single communications channel") was a well‑known technique. KSR makes "known technique" a strong rationale — but the technique must be tied to the reference's architecture, which is exactly where Ground 1B failed.
3. Design incentive / market forces. The '653 specification itself asserts the unfulfilled need for increased wireless data rates (the 14.4 kbps limitation is discussed at length). That admission, if attributed to the art, supplies a motivation.
4. Finite number of predictable solutions ("obvious to try"). For claims 14–16 and 15–16, assigning one IP address per bearer is one of a handful of predictable options.
5. Express teachings motivating combination. Bernard expressly contemplates simultaneous use of multiple communication circuits; Billström expressly describes packet data in cellular; Preiss expressly addresses complementary (different‑band) antennas.

Reasons the combinations were/are resisted:

• Teaching away: Yegoshin's busy‑signal/call‑forwarding description cuts against simultaneous multiplexing.
• "Artificial bottleneck": the claim‑17 remand issue — inserting Bernard's serial interface into Yegoshin's phone trades away the very benefit (throughput) the combination is supposed to deliver.
• Hindsight: the "multitudinous references" argument (five references for one claim) and the Board's finding that the multiplexing treatises do not map onto Yegoshin's call handling.
• Claim construction: the narrow "multiplexed signals" construction is dispositive for 1–13 and 27–30.

5. Secondary considerations

No evidence of secondary considerations appears in the record I retrieved (no nexus, long‑felt‑need, unexpected‑results, or industry‑praise evidence was relied on by either party in the FWD or on appeal). The '653 family is actively asserted (W.D. Tex. 6:21‑cv‑00603, later N.D. Cal. 3:23‑cv‑04168; three CAFC appeals) and was subject to IPRs by both Apple and Samsung, which is litigation evidence, not § 103 secondary‑considerations evidence. If you need a full Graham record, commercial‑success/licensing evidence would have to be developed separately.

6. Bottom line

• Claims 14–16 (and 15/16 dependents): obvious over Yegoshin + Billström + Johnston. Held unpatentable; that holding is final.
• Claim 17 and dependents (per the reported 17–21, 23 grouping): element mapping exists (Bernard's serial interface 701), but the holding is vacated and remanded on the motivation‑to‑combine (bottlenecking) question; do not treat these claims as cancelled.
• Claims 1–13 and 27–30: not proven obvious on this record; the CAFC affirmed on Aug. 27, 2026. These claims survive only because the petitioner could not show true multiplexing under the Board's construction and could not show the claim‑27 signal‑strength/connectivity trigger. A future challenge must either (a) attack the "multiplexed signals" construction, or (b) marshal art that actually produces a composite signal on a common pathway (e.g., a TDM/FDM multi‑radio baseband combiner) rather than a selector, plus a reference teaching fallback on signal degradation for claim 27.
• Claim 22: never challenged.

Open items you should verify before relying on this: (i) the effective priority date (1996 vs. 1999) — the whole Yegoshin‑based case turns on it; (ii) the true bibliographic identities of Johnston, Billström, Bernard, Sainton, Preiss, and WO748 (I could not confirm patent numbers and did not fabricate them); (iii) the exact dependency chain for claims 24–26, which affects the scope of the CAFC's vacatur; (iv) the Board's post‑remand handling of claim 17, which was not in any source I retrieved as of the Aug. 27, 2026 opinion.