US 8224322

I'll verify the patent details and check for any litigation/docket activity.

Let me confirm the granted (issued) claim set, since the pre-grant publication claims can differ from the granted claims.

Let me pin down the full granted claim set (the issued claims differ from the pre-grant publication).

US 8,224,322 — Verification Summary

Source note / method: I searched for this specific number (rendered as both "8224322" and "8,224,322") across the USPTO-derived records available to me (Google Patents' mirror of the granted patent and its prosecution/assignment events, Justia, RPX/Unified Patents, PTAB papers) and the CAFC 2026 opinion/order listings. I did not open USPTO PatentCenter or PACER directly in this session, so document-level citations below are to the public web records, not to primary USPTO files. Where records conflict (see "Uncertainties"), I flag it rather than choose silently.

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Bibliographic data

Assignment/security events of note: an assignment to Lemko Corporation (2006); a "covenant not to sue" recorded to Motorola Solutions, Inc. (Feb. 21, 2012) — press reporting ties that covenant to the '988 patent, not to '322; and a patent security agreement to Piccadilly Patent Funding LLC, as security holder (Mar. 25, 2025). A continuation was filed off this disclosure as US 13/493,670, which issued as US 9,253,622.

Abstract (as issued)

"A method of registering a mobile subscriber within a network including distributed mobile architecture nodes is disclosed. The method includes receiving a registration request from a mobile subscriber at a first distributed mobile architecture node within the network and storing an identifier of the first distributed mobile architecture node and the mobile subscriber at a memory location within a visitor location register (VLR) gateway. The VLR gateway is coupled to an element of a wide area wireless network. Also, a computer readable memory accessible to a distributed mobile architecture node of a distributed internet protocol network is disclosed. The computer readable memory includes a first field to identify a visiting mobile subscriber unit and a second field to identify an address of one of the distributed mobile architecture nodes of the distributed internet protocol network."

Plain-language overview of the independent claims

The patent's teaching, in one line: when a phone roams into a small, IP-linked cellular node (a "DMA node" that bundles MSC + BSC + HLR/VLR functions), the network needs a way to tell the big outside cellular network where that phone is. The invention does this with a VLR gateway — a shared registry that maps each visiting phone to the IP address of the DMA node currently serving it, with information relayed node-to-node.

Independent claim 1 — a method (registration). Steps a first DMA node performs:

1. A first DMA node (serving "coverage site 1" of a multi-site DMA network) receives a registration request from a visiting/roaming mobile subscriber.
2. In response, it stores that subscriber's identifier in a VLR located at that same DMA node — each DMA node keeps its own local VLR entry set for the visitors in its own coverage site.
3. The node transmits the identifier to a VLR gateway, routed via the second DMA node; the gateway sits at a different location than the first node.
4. The VLR gateway stores the visiting subscriber's identifier together with the first DMA node's IP address, recording that the visitor registered there. The gateway aggregates registration information coming from multiple DMA nodes (it also holds the second node's set), and the claim requires that at least one visiting unit's home coverage site differs from both site 1 and site 2 — i.e., genuinely roaming subscribers, not just local ones.
5. The VLR gateway is coupled to an element of a wide area wireless network (e.g., an MSC, itself coupled to an HLR), which is how the legacy macro network can locate the roamer inside the DMA network.

Independent claim 17 — a system (apparatus counterpart). The same idea in hardware terms:

• a first DMA node (receives the registration request, stores the identifier in its local VLR, forwards the identifier),
• a second DMA node (serves a different coverage site, has its own local VLR, receives the identifier from the first node), and
• a VLR gateway (receives the identifier via the second node; is coupled to a wide-area-network element; is remote from the first node; aggregates both nodes' registration information; stores the visitor identifier plus the serving DMA node's IP address to indicate where the visitor registered).

Dependent-claim themes (context, not independent scope): identifiers as IMSI / ESN / IMEI; forwarding to the HLR; VLR-gateway-to-MSC messaging and confirmation; registration-acknowledge messages; peer-to-peer connections between DMA nodes; and a third DMA node/third VLR extension.

Litigation posture (as of this date)

• Lemko Corp. v. AT&T Inc. et al., No. 2:25-cv-00305 (E.D. Tex., filed Mar. 17, 2025; Judge Rodney Gilstrap). The '322 patent is one of seven Lemko patents asserted (7,840,230; 7,979,066; 8,224,322; 8,310,990; 8,340,667; 8,359,029; 9,198,020). The accused products are the AT&T Private Edge 5G Network platform / Private Mobile Connection service. Infringement contentions were served July 23, 2025. Google Patents also flags this case under the '322 family ("Family has litigation").
• PTAB: the co-pending IPRs I found involving Lemko (IPR2023-00529, -00530, -00531; IPR2025-01142) target other Lemko patents (e.g., 7,653,414; 7,548,763; 7,855,988; 8,310,990). I found no IPR petition specifically against 8,224,322.
• CAFC 2026: the only 2026 Lemko appellate item I found is Lemko Corp. v. Microsoft Corporation, No. 2024-2336 — a Rule 36 affirmance entered April 10, 2026 (appeal from PTAB IPR2023-00531). That IPR concerns U.S. 7,855,988, a different patent. I found no CAFC 2026 docket involving 8,224,322.

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Explicit uncertainties / caveats

1. No CAFC 2026 docket for '322 found. The 2026 Federal Circuit activity in this family that surfaced (24-2336, decided Apr. 10, 2026) is about patent '988, not '322. I cannot rule out a docket I did not surface, but nothing in the records I retrieved ties a 2026 CAFC appeal to 8,224,322.
2. Similar-number traps — do not conflate. (a) A "'822 patent" appears in a PTAB paper concerning TSMC v. Marlin Semiconductor (with an ITC Investigation No. 337-TA-1443 reference); that is a different patent and a different party from Lemko's '322. (b) Lemko's '988, '990, and '822 are distinct assets; the Microsoft/Affirmed and IPR2025-01142 activity belongs to '988 and '990, not '322.
3. Claim-text discrepancy between the publication and the grant. The claims reproduced on Espacenet/Justia for the pre-grant publication US 2007/0287452 are not the issued claims. The granted '322 claims (per Justia and the RPX litigation record, and as quoted in Lemko's AT&T complaint) are materially narrower and restructured — e.g., granted claim 1 recites a specific DMA network with per-site VLRs, relay of the visitor identifier via the second DMA node to a remote VLR gateway, storing the node's IP address, and a visitor whose home coverage site differs from both sites. The granted claim 1 does not read like the published claim 1. Treat the published-application claim text as superseded.
4. Completeness of the granted claim set. From the records I retrieved, the granted independent claims appear to be claim 1 (method) and claim 17 (system), with dependent claims extending at least to claim 23 (IMSI/ESN/IMEI, HLR forwarding, MSC messaging, acknowledge-after-confirmation, etc.). I could not retrieve a complete official claim listing from USPTO PatentCenter in this session, so I flag the possibility that additional independent claims exist (the published application had four independent claims: a method, a computer-readable memory, a visitor location register, and a routing method). Verify against the certified copy if claim scope is critical.
5. Legal-status and expiration ("Active," "adjusted expiration 2028-09-22") are the flags Google Patents attaches as assumptions, not USPTO determinations.

I'll research litigation involving US patent 8224322. Let me run several searches.

The Google Patents page flagged a Texas Eastern District case. Let me dig into that and related Lemko litigation.

Let me check PTAB proceedings and other Lemko enforcement actions involving this patent.

Litigation Involving U.S. Patent No. 8,224,322

Bottom line: I identified one district court case that actually asserts U.S. Patent No. 8,224,322 (the Lemko v. AT&T case flagged on the patent's own Google Patents page). I found no other district court case, and no PTAB proceeding, specifically asserting or challenging the '322 patent. Below is what is verifiable, plus what is not.

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1. Case where '322 IS asserted

Sources:

• Google Patents entry for US8224322B2 (flags the E.D. Tex. case 2:25-cv-00305 and Darts-ip "First worldwide family litigation filed"): https://patents.google.com/patent/[US8224322](/patent/US8224322)/en
• Lemko press release, March 17, 2025: https://www.lemkocorp.com/lemko-corporation-files-patent-infringement-lawsuit-against-att/
• RPX/Mondaq case summary listing the seven patents incl. '322: https://litigation.rpxcorp.com/news/85618-at-t-hit-in-lemko-s-edge-computing-campaign and https://webiis08.mondaq.com/unitedstates/patent/[1622202](/patent/1622202)/
• PACER Monitor docket: https://www.pacermonitor.com/public/case/57258476/Lemko_Corporation_v_ATT_Inc_et_al
• Justia — Dkt. 79, Memorandum Opinion & Order denying transfer (03/06/2026): https://law.justia.com/cases/federal/district-courts/texas/txedce/2:2025cv00305/[236690](/patent/236690)/79/
• Complaint/claim-chart analysis: https://ai-lab.exparte.com/case/dct/txed/2:25-cv-00305/doc/analysis/1

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2. Lemko enforcement actions that do NOT assert '322

• Lemko Corp. v. [Microsoft Corp.](/litigations/by-plaintiff/Microsoft%20Corp.) & Affirmed Networks, Inc., N.D. Tex. Case No. 3:22-cv-363-L-BT, filed February 14, 2022 (Judge Sam A. Lindsay). Patents asserted: 7,548,763; 7,653,414; 7,855,988; 8,107,409; 8,688,111; 9,191,980; 9,332,478; 9,755,931. '322 is not in this set (though the families overlap). Order of 6/4/2025 granted dismissal of contributory infringement claims but otherwise denied Microsoft's motion to dismiss; subsequent Fed. Cir. activity reported (Law360, April 10, 2026, regarding affirmance of PTAB invalidity findings).

  • https://law.justia.com/cases/federal/district-courts/texas/txndce/3:2022cv00363/[359096](/patent/359096)/94/

• PTAB: Microsoft Corp. & Affirmed Networks, Inc. v. Lemko Corp., IPR2023-00529 (U.S. 7,653,414) and IPR2023-00531 (U.S. 7,855,988). These challenge related Lemko patents, not '322. I found no IPR, PGR, or CBM proceeding naming U.S. 8,224,322.

  • https://www.docketalarm.com/cases/PTAB/IPR2023-00529/Microsoft_Corporation_v._Lemko_Corp/

• Motorola, Inc. v. Lemko Corp., et al., N.D. Ill. Case No. 08 C 5427 (decision Jan. 10, 2012, on summary judgment). This is a trade-secret / patent-ownership suit — Motorola sought a declaratory judgment that it owned eight Lemko patents and ten applications conceived during Pan's and Labun's Motorola employment. Lemko's counter-suit (trade secrets) followed. I could not confirm from the available sources whether '322 (application filed June 12, 2006; issued July 17, 2012) was among the eight patents claimed by Motorola in that ownership dispute, even though the timeframe (Lemko filings 2004–2009) fits. Treat this as unverified rather than a confirmed '322 case.

  • https://case-law.vlex.com/vid/motorola-inc-v-lemko-890747149

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3. Related but non-litigation events (for completeness)

• 02/21/2012 — Lemko granted Motorola Solutions, Inc. a covenant not to sue (USPTO assignment record). Per RPX, that covenant relates to the '988 patent, not '322.
• 03/25/2025 — Piccadilly Patent Funding LLC, as security holder, holds a patent security agreement from Lemko — relevant to enforcement/standing posture but not a lawsuit.

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Caveats you should carry forward

1. Strict-identifier discipline applied. All numbers above are reproduced literally as they appear in the cited sources; I did not normalize or "correct" any digits.
2. The Darts-ip link on the Google Patents page ("First worldwide family litigation filed", family 38822587) suggests there may be additional family-level litigation (possibly foreign, or other family members such as the continuation US 9,253,622). I did not open that record before exhausting my search budget — it is the single best next place to look if you need a completeness certification.
3. No results were found for other alleged '322 defendants. Searches for the patent number plus litigation returned only the Lemko/AT&T matter and unrelated patents.
4. Because the AT&T case is at the pleading/venue stage (transfer denied 03/06/2026), there is no claim-construction order, summary judgment, trial, or appeal on '322 to report. A willfulness finding is a live damages theory but not yet adjudicated.

If you need this certified, the two follow-ups are (a) the Darts-ip family record 38822587, and (b) a PACER docket pull for 2:25-cv-00305 to confirm the case's post-April-2026 status (and any institution decision on the PTAB petitions AT&T may have filed, which I could not confirm).

I'll start by searching for any PTAB proceedings involving this patent, then verify with USPTO/PTAB sources.

The searches surfaced a lot of Lemko PTAB activity, but I need to pin down whether any proceeding actually challenges the '322 patent. Let me dig further.

Proceedings overview

US 8,224,322 has zero AIA trial proceedings on file — no IPR, no PGR, no CBM. The structured "PTAB proceedings on file" block (USPTO ODP) returns none, and my independent searches of PTAB E2E/PTACTS, Docket Alarm, the Unified Patents PTAB case list, and the Lemko-family briefing surfaced no petition ever filed against the '322 patent (Lemko Corp., "Roaming mobile subscriber registration in a distributed mobile architecture," filed 2006-06-12, granted 2012-07-17). I also found no evidence of an ex parte reexamination or a Federal Circuit appeal touching this particular patent.

Bottom line for a defendant: the '322 patent is completely untested at the PTAB — no claims canceled, no claims sustained, no IPR estoppel running against anyone. That cuts both ways: nothing on this patent is "sanction-bait," but you also get no free validity win from a prior petitioner's work product. You would be first to the Board on this patent, and the current discretionary-denial environment (see IPR2025-01142, below) is the real headwind, not any prior adjudication.

Caveat on completeness: the ODP feed is the canonical list but is only current through its last ingest. I could not rule out a petition filed very recently and not yet indexed, but I found no trace of one, and a filing that recent would not yet have an institution decision.

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Proceedings on US 8,224,322

None — nothing to itemize

There is no {PROCEEDING_NUMBER} to report. I will not invent one. If you are evaluating a demand letter or complaint from Lemko asserting the '322 patent, note that the assertion vehicle is the parallel district court case, not a PTAB proceeding: Lemko Corp. v. AT&T, No. 2:25-cv-00305 (E.D. Tex., filed 2025-03-17, Judge Rodney Gilstrap), in which Lemko asserts 7,840,230; 7,979,066; 8,224,322; 8,310,990; 8,340,667; 8,359,029; and 9,198,020 against AT&T's Private Edge 5G Network / Private Mobile Connection offerings (Mondaq coverage, 2025-05-09; Google Patents).

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Related Lemko-family AIA proceedings (context only — none involve the '322 patent)

These matter only as pattern signals. Do not cite them as adjudications of US 8,224,322.

IPR2023-00531 — Microsoft Corporation & Affirmed Networks, Inc. v. Lemko Corp.

• Type: Inter Partes Review
• Patent challenged: US 7,855,988 (a sibling DMA-gateway patent — not '322)
• Filed: 2023-02-14
• Status: Final Written Decision (2024-09-10); appealed by patent owner
• Judge panel: Raevsky, joined by Ippolito and Range (paper author); the panel was later expanded — Docket Alarm lists Range, Ippolito, Raevsky, Lorin, and Powell
• Petition grounds: Claims 1, 3–9, and 20 unpatentable under 35 U.S.C. § 102 as anticipated by Flore (US 2007/0021120)
• Institution decision: Instituted 2023-09-25. Lemko's request for rehearing and Director Review of the institution decision (filed 2023-10-10, challenging the Board's refusal to resolve the "distributed" construction) was denied (Board order 2023-11-17).
• Final Written Decision: Issued 2024-09-10 (Paper 31). The Board found the challenged claims unpatentable — i.e., Microsoft prevailed and Lemko appealed. Panel takeaway as summarized by Banner Witcoff: "the mere fact that a claim separately recites two different claim terms (e.g., 'a DMA server' and 'a legacy communications network') does not guarantee that one of those terms excludes the other." Full text: Banner Witcoff copy of the FWD (IPR2023-00531); docket: Docket Alarm, IPR2023-00531.
• Settlement / termination: None — tried to FWD.
• Appeal: Yes. Lemko filed a Notice of Appeal 2024-09-16; its opening brief is dated 2025-01-29 (Federal Circuit brief hosted on PTACTS). Issues: (1) the Board misconstrued "communications information" contrary to the plain claim language; (2) the Board failed to construe the dispositive term "distributed." I could not confirm the Federal Circuit docket number or the disposition from the sources reviewed — treat the appeal's outcome as unresolved pending verification on CourtListener.
• Defensive value: Indirectly useful as a § 102/Flore template for DMA-gateway-style claims and as an adverse claim-construction precedent against Lemko's narrow "distributed" theory. But it is not estoppel-generating as to '322, and it is a different claim set on a different patent.

IPR2025-01142 — Microsoft Corporation & AT&T Services, Inc. v. Lemko Corp.

• Type: Inter Partes Review
• Patent challenged: US 8,310,990 (the '322 patent's sibling/family member — not '322 itself, but this is the closest litigation-context analog)
• Filed: 2025-06-20
• Status: Institution DENIED (discretionary denial) — docket and related notices show an institution decision dated 2025-11-20 and a Notice of Order Denying Institution (Paper 11, dated 2025-11-06) listing IPR2025-01142 among petitions denied under 35 U.S.C. § 314(a). Lemko's POR had identified a 2026-01-08 DI deadline, so the denial came early under the Director's interim discretionary process.
• Judge panel: Not applicable — denial occurred at the institution (Director/discretionary) stage.
• Petition grounds: Claims 1 and 3–9 unpatentable under § 102 by Flore — the same reference and substantially the same mapping that succeeded in the '988 IPR (ex parte petition analysis).
• Institution decision / reasoning: Lemko sought discretionary denial, arguing (i) settled expectations given the patent had been in force over a decade, (ii) AT&T's ~12 years of knowledge of Lemko's technology, (iii) substantial investment in the co-pending E.D. Tex. action, and (iv) 35 U.S.C. § 325(d) — the same Flore/"computer readable medium" arguments Microsoft had already lost in the -00530 IPR (Patent Owner's Request for Discretionary Denial). The petition was not instituted.
• Final Written Decision: None — no trial.
• Settlement / termination: No — denial, not settlement.
• Appeal: No appeal identified (institution denials under § 314(d) are generally non-appealable).
• Defensive value: Materially negative for a would-be IPR petitioner. A petition that recycles the successful Flore theory from the '988 IPR was nonetheless denied. A defendant now weighing an IPR on the '322 patent should expect the same discretionary-denial arguments — long-settled patent (in force since 2012), parallel E.D. Tex. case, and § 325(d) overlap with the Microsoft Lemko-family petitions.

IPR2023-00529 — Microsoft Corporation & Affirmed Networks, Inc. v. Lemko Corp.

• Type: Inter Partes Review
• Patent challenged: US 7,653,414 (sibling — not '322)
• Filed: 2023-02-14
• Status: Instituted 2023-09-25; oral hearing held 2024-07-11; claim-level disposition not confirmed in the sources I reviewed (an FWD was expected in the same September 2024 window as IPR2023-00531)
• Judge panel: Ippolito, Range, Raevsky (hearing panel); later expanded per Docket Alarm (Lorin, Powell)
• Petition grounds: Primary art Waylett (US 8,184,603), combined with Mauer (US 7,395,085), per petitioners' statements at the 2024-07-11 hearing
• Institution decision: Instituted 2023-09-25
• Final Written Decision: Not verified — I am not asserting an outcome I could not confirm
• Settlement / termination: None identified
• Appeal: None confirmed
• Defensive value: Limited and unverified; use only as background on how the Board has treated Lemko's DMA claims.

IPR2023-00530 — Microsoft Corporation & Affirmed Networks, Inc. v. Lemko Corp.

• Type: Inter Partes Review
• Patent challenged: US 7,548,763 (sibling — not '322)
• Filed: 2023-02-14
• Status: Not instituted — merits; terminated 2023-09-25 (per Unified Patents PTAB case list for Affirmed Networks as petitioner)
• Judge panel: Ippolito, Range, Raevsky (co-paneled with the -00529/-00531 family)
• Petition grounds: Waylett, argued to disclose a "network in a box" that necessarily implements components on a computer readable medium
• Institution decision: Denied 2023-09-25 — the Board was unpersuaded that Waylett "necessarily teaches a computer readable medium," noting Waylett's functions are implemented in hardware (as recited in Lemko's preliminary response)
• Final Written Decision: None
• Settlement / termination: None
• Appeal: None
• Defensive value: Useful only as the source of Lemko's § 325(d) "same art, already rejected" argument later used to defeat IPR2025-01142.

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Strategic summary

Claim status of US 8,224,322. Every claim of the '322 patent is UNTESTED and therefore presumed valid and enforceable. No claim has been canceled, no claim has been sustained, and no claim has been narrowed by any PTAB or Federal Circuit decision. The patent's claimed subject matter (per the disclosure's Summary section) spans five distinct claim families — a mobile-subscriber registration method storing a first DMA node identifier and subscriber identifier in a VLR gateway memory location; a computer readable memory with fields for visiting-subscriber identity and DMA-node address; a visitor location register data structure with items for two visiting subscribers and two DMA-node addresses; a wide-area-network-to-DMA call-routing method; and a call-placement method. Nothing in any of the Lemko-family IPRs constrains the scope of any of these claims. If you are drafting invalidity contentions, you are starting from a blank PTAB slate.

Estoppel landscape. Section 315(e)(2) estoppel runs only against a petitioner (and its privies) as to the patent it challenged. Microsoft, Affirmed Networks, and AT&T challenged the '988, '763, '414, and '990 patents — never the '322. Accordingly:

• No statutory estoppel blocks any prior-art ground against the '322 patent, and no one is barred from raising § 102/§ 103 art against it.
• What would be barred by the prior Microsoft/Affirmed FWDs is relitigating the '988 claims — irrelevant here.
• The only real constraints on a new petitioner are (a) the § 315(b) one-year bar measured from service of a complaint alleging infringement of the '322 patent (the E.D. Tex. case was filed 2025-03-17; if you were served on or about that date, your IPR window closed on or about 2026-03-17 — confirm the exact service date), and (b) § 325(d and the Director's discretionary-denial practice, which is where IPR2025-01142 died.

Pattern signals. (1) Microsoft/Affirmed is a serial repeat petitioner — three parallel IPRs filed 2023-02-14 against Lemko's '414, '763, and '988 patents, then a fourth petition in 2025 (IPR2025-01142) joined by AT&T against the '990. That is a coordinated Big-Tech-vs-Lemko campaign, not a one-off. (2) Lemko litigates its PTAB losses aggressively — it sought rehearing and Director Review of the '529/'531 institution decisions in October 2023, and appealed the adverse '531 FWD to the Federal Circuit in September 2024, briefing the appeal in January 2025. (3) No defensive aggregator is in the chain — I found no Unified Patents, RPX, or similar third-party IPR against Lemko's patents; the '322 patent in particular has attracted none. (4) The Board has already credited the Flore reference against Lemko's DMA-gateway claims in the '988 IPR, and Lemko's "distributed ≠ hierarchical" construction has been rejected at least once — but that win was on a different patent, and the Board still denied institution on the closely-related '990 petition in 2025.

Recommended next steps

• If you are a defendant on the '322 patent: there is no FWD to link to, because none exists. Do not build a defense on a PTAB outcome. The patent is fully live and every claim is fair game for the patent owner. Your invalidity case must be built from scratch (Flore, Waylett, Mauer, and the Lemko-family Art Units 2400/2477 are the natural starting points given the Board's prior comfort with those references against Lemko's DMA claims).
• Watch the § 315(b) clock. The E.D. Tex. complaint was filed 2025-03-17. If you were served in that window and are an AT&T privy or co-defendant, your IPR filing deadline is service + 1 year. Calendar it and verify the service date from the docket.
• Expect a discretionary-denial fight, not a merits fight, at the institution stage. The Board denied IPR2025-01142 on settled-expectations / parallel-litigation / § 325(d) grounds even though the petition re-used the Flore theory that had won in the '988 IPR. If you file on '322, be prepared with (i) a strong § 325(d) distinguishing showing (feed the '322 claims' VLR-gateway "roaming registration" limitations, which were not at issue in any prior petition), (ii) a § 314(a)/Fintiv rebuttal keyed to the E.D. Tex. schedule under Judge Gilstrap, and (iii) evidence of a change in law or newly discovered art to counter the "twelve years settled" narrative Lemko has already road-tested.
• Monitor the Lemko v. Microsoft Federal Circuit appeal from the '531 FWD (Lemko opening brief 2025-01-29). A Lemko win there would revive its "distributed" claim-construction theory and could blunt a Flore-based challenge to the '322 patent, which sits in the same DMA family. [I could not confirm the CAFC docket number or disposition — verify on CourtListener before relying on it.]
• Verify freshness. The ODP ingest shows no PTAB activity; my searches corroborate that. Before finalizing any opinion letter, run a fresh check on PTAB E2E / PTACTS and Docket Alarm for filings in the last few weeks that may post-date the ingest.

Confidence and verification limits: High confidence that no AIA trial proceeding exists against US 8,224,322. High confidence in the IPR2023-00531 facts (filed 2023-02-14, instituted 2023-09-25, FWD 2024-09-10, claims 1/3–9/20 anticipated by Flore, Lemko appeal). Medium confidence in the IPR2025-01142 denial date (sources show both 2025-11-06 and 2025-11-20 — I have flagged both). Low confidence on IPR2023-00529's claim-level outcome — I could not verify it and have not stated one. No docket number is asserted for the Federal Circuit appeal.

I'll start by gathering what I can verify about this patent's ownership chain from public sources.

Ownership & Assignment Analysis — US 8,224,322 B2

Patent: Roaming mobile subscriber registration in a distributed mobile architecture
Application: US 11/451,238 · Filed: 2006-06-12 · Issued: 2012-07-17 · Priority: 2006-06-12
Current assignee of record (Google Patents legal events): Lemko Corp.

Data-access caveat (read first). I could retrieve the Google Patents legal‑events chain (dates, conveyance types, assignors/assignees) but not the USPTO Assignment Center reel/frame numbers or correspondent‑of‑record fields — the Assignment Center was not reachable as a queryable source in this session, and Google Patents' legal‑events feed does not expose reel/frame or correspondent. No reel/frame numbers are fabricated below; the fields I could not verify are marked "not retrieved." Also note that Google Patents rolls up family‑level events, so at least one entry below (the 2012 Motorola covenant) may actually be recorded against a sibling patent rather than this one. Verify directly at assignmentcenter.uspto.gov (search by patent number 8224322) before relying on any single link.

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Inventors

Unusual pattern — flag. This is a single‑inventor patent family originating from an inventor who left a large incumbent (Motorola) and filed within months. Motorola, Inc. v. Lemko Corp., No. 08 C 5427 (N.D. Ill.) (Kennelly, J.) — Motorola sought a declaratory judgment that it owned eight Lemko patents and ten applications on the theory that Pan and co‑founder Nicholas Labun conceived them during Motorola employment. The court denied both sides' summary‑judgment motions in January 2012, i.e., ownership was contested and not resolved on the papers. This is an ownership‑dispute pattern, not a fire‑sale pattern — but it is the single most important non‑assignment fact about this patent's provenance. (Source: Motorola v. Lemko opinion, Dkt. 912.) Labun is not a named inventor on the '322 patent, despite being named on other Lemko filings.

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Original assignee

Lemko Corporation ("Lemko Corp"; recorded as "LEMKO, CORPORATION") — an Illinois corporation formed 2002‑08‑02 by ShaoWei Pan and colleagues.

• Line of business: distributed mobile architecture (DMA) equipment — collapsing MSC + BSC + HLR/VLR into a compact, distributed, IP‑interconnected "DMA server" node for rural/underserved and tactical networks.
• Did it ship product embodying the claims? Yes, historically. Lemko's commercial Node1 / DMA product line was patent‑marked with Lemko patents. Lemko's own PTAB filings assert that it "commercialized the claims of the '990 Patent, in its various patent‑practicing products," and the 2025 AT&T complaint (¶¶ 42–43, 64) alleges Lemko demonstrated patent‑marked Node1 models to AT&T in September 2013. (Source: PTAB Patent Owner submission; Lemko v. AT&T complaint via RPX.)
• Current status: Operating entity, still private, but substantially litigation‑focused. No evidence of bankruptcy, dissolution, or assignment of title out of Lemko was found. However, a 2025‑03‑25 patent security agreement to Piccadilly Patent Funding LLC (see timeline) indicates the portfolio is now pledged as collateral — a classic secured‑financing/distress footprint. Whether Lemko presently ships a product is unclear from public records; its public posture since 2022 is that of an active plaintiff.

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Assignment timeline

Chronological, from Google Patents legal events. Reel/frame and correspondent: not retrieved for any entry.

• 2006‑06‑12 (executed / filed) — recorded 2006‑06‑12 — Reel not retrieved

  • Conveyance: Assignment of assignors' interest (inventor assignment at filing)
  • Assignor: ShaoWei Pan
  • Assignee: Lemko Corporation (recorded as "LEMKO, CORPORATION")
  • Correspondent: not retrieved
  • Context: Initial inventor‑to‑company assignment, executed contemporaneously with filing. Title to the patent originates here and has never been recorded as leaving Lemko.

• 2006‑08‑23 — Reel not retrieved

  • Conveyance: Change of assignee's address (administrative)
  • Assignor: Lemko Corporation
  • Assignee: Lemko Corporation
  • Correspondent: not retrieved
  • Context: Change‑of‑address only; no change in ownership. Two months post‑filing — consistent with a housekeeping filing, not a transfer.

• 2012‑02‑21 — Reel not retrieved

  • Conveyance: Covenant not to sue (a license‑type instrument, not a title transfer)
  • Assignor: Lemko Corporation
  • Assignee: Motorola Solutions, Inc.
  • Correspondent: not retrieved
  • Context: Settlement‑related covenant following the Motorola v. Lemko litigation. ⚠ Verify scope: the Mondaq litigation report states USPTO records show the Lemko→Motorola Solutions covenant was given for the '988 patent (US 7,855,988), not the '322 patent; this entry may be a family‑level roll‑up on Google Patents. Either way, ownership was not conveyed — Motorola got a defensive covenant, not title.

• 2025‑03‑25 — Reel not retrieved

  • Conveyance: Patent security agreement
  • Assignor: Lemko Corporation
  • Assignee: Piccadilly Patent Funding LLC, as security holder
  • Correspondent: not retrieved
  • Context: Securitization / collateral pledge. Lemko retains title unless and until default; the security holder takes a lien, not ownership. Recorded within days of the AT&T complaint (EDTX 2:25‑cv‑00305) — see Signal 5.

Non‑assignment events in the same feed, listed for completeness: 2012‑06‑11 "priority to US 13/493,670" (continuation family — US 9,253,622) and the 2028‑09‑22 adjusted expiration (PTA/terminal disclaimer). Neither is an ownership event.

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Timeline diagram

timeline
    title Ownership of US 8224322
    2006 : Pan assigns patent to Lemko at filing
         : Lemko records address change
    2012 : Patent issues to Lemko
         : Covenant not to sue to Motorola Solutions
    2022 : Lemko sues Microsoft over the family
    2025 : Lemko pledges patent to Piccadilly
         : Lemko sues AT&T in EDTX

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NPE / troll-pattern signals

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Verdict

Operating-company assertion.

Why: Title to US 8,224,322 has remained with Lemko Corporation since the 2006‑06‑12 inventor assignment, and Lemko is the sole plaintiff asserting it (E.D. Tex. 2:25‑cv‑00305, 2025) — against AT&T, an actual competitor selling the accused AT&T Private 5G Edge / Private Mobile Connection services. Lemko commercialized the claims in its patent‑marked Node1/DMA products, which is the classic operating‑company profile rather than a shell‑LLC NPE. None of the eight NPE signals is affirmatively present on the recorded chain.

Two honest caveats, stated so they aren't mistaken for findings:

1. The classic NPE structure is absent, but the behavior is NPE‑adjacent. Lemko is a small, litigation‑focused former manufacturer with two assertion campaigns and a 2025 pledge of the portfolio to Piccadilly Patent Funding LLC — a funding/distress signal. If Lemko has ceased shipping product, it functions as a "failed operating company" asserting legacy patents, which many commentators treat as conduct‑equivalent to NPE activity even without a shell transfer. Public records do not establish current product shipments either way.
2. The most probative evidence is missing. Reel/frame and correspondent‑of‑record were not retrievable in this session; the repeat‑correspondent test (Signal 3) therefore cannot be scored. Verify all four entries and their correspondents at the USPTO Assignment Center and cross‑check the Google Patents legal events and the Unified Patents litigation record (Darts‑IP family 38822587).

Uncertainty statement: I could not confirm the current litigating posture, the executed (vs. recorded) date of the Piccadilly security agreement, or any correspondent names. Where those facts would change the call, I have said so rather than inferring.

I'll search for the specific patent's cited references. Let me run several targeted searches.

I found a Unified Patents page listing references. Let me pull the actual front-page citation lists from multiple sources.

Important methodological caveat before the list

I ran the requested searches against the publicly accessible USPTO‑derived records (Google Patents' mirror, the Unified Patents patent page, Justia, and USPTO PTAB/assignment pages surfaced by search). I was unable to open USPTO PatentCenter itself, and I could not retrieve the machine‑readable front page ("References Cited" box) of the issued patent PDF in this session — my search budget was exhausted before I could pull the patentimages.storage.googleapis.com OCR of the '322 front page.

That matters because the authoritative "patent citations for 8224322" live in that front‑page box, split into U.S. Patent Documents, Foreign Patent Documents, and Other Publications, and each entry is tagged with whether it was cited by the examiner (asterisked) or by the applicant. The list below is the best‑available surrogate: the reference set displayed on the Unified Patents portal page for US‑8224322‑B2, cross‑checked against Google Patents. I cannot certify from this session's evidence whether each item is (a) a reference cited in '322, (b) a forward "cited‑by" citation, or (c) a "similar document" — the portal mixes these. Items I could not independently confirm I flag as such rather than presenting them as certain prior art.

I have not invented or "completed" any citation. Everything in the table appeared in retrieved results. No similar patent numbers were substituted (e.g., I did not fold in the unrelated "'822 patent" reference from the TSMC/Marlin PTAB paper flagged in the earlier litigation section).

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The reference set surfaced for US 8,224,322

Dates below are as displayed (I distinguish filing vs. publication where the record showed it). "Pub. rel. to 6/12/2006" = whether it predates the '322 filing date, i.e., is facially available as §102(a)/(b) art.

Two red flags on provenance. Items 18 (explosive‑device detonation) and 23 (contextual content targeting) are subject‑matter outliers for a roamer‑registration patent. Their presence strongly suggests the retrieved portal list is not a clean "References Cited" box — it likely blends examiner/applicant citations with "similar documents" and forward "cited‑by" results. Treat rows 18 and 23 as very probably misfiled unless confirmed against the certified front page.

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Most relevant prior art and the §102 read

Framework. The granted independent claims (per the earlier-generated summary, which I adopt) are claim 1 (registration method) and claim 17 (system), both requiring a combination: (i) a compact IP‑linked DMA node that bundles MSC+BSC functions and receives a registration from a visiting/roaming subscriber; (ii) a local VLR at the serving node; (iii) relaying the visitor identifier via a second node to a remote VLR gateway; (iv) the gateway storing identifier + serving node's IP address and aggregating multiple nodes' visitors; and (v) the gateway being coupled to a macro‑network element (MSC→HLR).

No single reference in the retrieved set is a facial "knock‑out." The strong candidates cluster in two groups:

Group A — roaming / VLR‑centric references (closest to claims 1 & 17):

• US 7,133,670 B1 (Sprint, 2003‑12‑28) — roaming agreement application/database between private and public wireless networks. Potentially relevant to the "visiting subscriber + network‑side registry" concept and the coupling to a public network element (claim 1/17, at least the "VLR‑like" registry and inter‑network element). But it does not appear to disclose a distributed multi‑node architecture with per‑node VLRs feeding one gateway.
• US 6,763,233 B2 (2000‑01‑04) — terminal roaming between intergenerational networks; relevant background to roaming registration/registration‑indicator mechanisms (maps to dependent claims on registration indicators/timers that the earlier summary flagged).
• US 2006/0052113 A1 (Constellation Software, pub. 2006‑03‑09) — "Roaming presence and context management." Relevant to storing a roaming subscriber's presence/location centrally (the VLR‑gateway idea), but not the DMA-node IP‑address mapping.

Group B — packet‑voice / distributed‑base‑station references (background to the DMA node itself):

• US 5,623,495 A — portable/base‑station architecture (compact base station; supports claim‑1 element (i) background).
• US 6,795,444 B1 (Ericsson) and US 6,542,497 B1 — packet‑switched wireless telephony / public wireless internet gateway (background to the node's gateway interfaces).
• US 6,751,207 B1 (AirTouch) — tunnelling voice over IP in a cellular network.
• US 2004/0014466 A1 (Motorola) — distributed real‑time radio processing (background to distributed control logic).
• US 2006/0142011 A1 (Nokia) — routing to a VoIP terminal (background to routing to a subscriber, ties to the "routing request" method theme).

Group C — same‑family (not §102 art against these claims in the ordinary sense):

• US 7,840,230 B2 and US 7,486,967 B2 are Lemko's own sibling applications off the same Pan disclosure. Against '322 these can only matter as §102(e)/obviousness‑type or double‑patenting considerations if they have an earlier effective date — not as third‑party anticipation.

Which claim(s) each candidate potentially touches

Bottom line on §102: on the evidence retrieved, none of the listed references appears to anticipate claim 1 or claim 17 as a single reference — the distinguishing combination (per‑node VLR → relay via a second DMA node → remote VLR gateway storing the serving node's IP address and aggregating multiple nodes' visitors → coupled to a macro MSC/HLR) is not shown in any one item I could inspect. The realistic role of this set is §103 obviousness/background, not §102 anticipation. That is consistent with the references being cited as technological background rather than as anticipatory art.

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Explicit limitations you should carry forward

1. I did not verify the actual front‑page "References Cited" box of the issued patent — the list above is a portal‑derived surrogate and may over‑ or under‑include. Rows 18 and 23 (and possibly the Lemko "pub./cited‑by" rows) are the ones I most suspect are mis‑categorized. The authoritative source is the certified copy or the USPTO PatentCenter "References Cited" / "Referenced By" tabs.
2. No "Other Publications" (NPL) references surfaced for '322 in this session. I cannot represent that there are none.
3. I did not retrieve full texts of any cited reference, so the §102/§103 calls above are preliminary and element‑level only; they are not claim charts. A definitive anticipation analysis requires the reference specifications and the '322 file‑wrapper remarks.
4. Cross‑reference to the earlier sections: the earlier Patent Summary flagged that the published‑application claims (US 2007/0287452) differ materially from the granted claims, with granted independents believed to be claim 1 (method) and claim 17 (system). I built the §102 mapping on the granted claim structure; if additional independent claims exist (the published app had four), those would need separate prior‑art treatment.
5. Date discrepancy (non‑material): the task header states "April 26, 2026," while the session date is 2026‑09‑29; this did not affect the search results.
6. Identifier discipline: every patent/publication number above is reproduced literally as retrieved; I did not normalize or "correct" any digit, and I deliberately excluded the unrelated "'822 patent" that appeared in an unrelated PTAB paper noted in the prior litigation section.

Best next step for a certified answer: pull the '322 front page's "References Cited" / "Referenced By" from USPTO PatentCenter (or the patentimages OCR PDF), then re‑run the §102 pass against the reference specifications — that will confirm or strike rows 18 and 23 and reveal any NPL citations I could not surface here.

I'll first try to locate the "Prior Art section" referenced in the task, then ground the obviousness analysis in retrievable references.

Let me ground a few key references precisely (dates, disclosure, and the "prior art" lists on the patent pages).

Obviousness Analysis — U.S. Patent No. 8,224,322 B2

“Roaming mobile subscriber registration in a distributed mobile architecture” (Pan; Lemko Corp.; filed June 12, 2006; issued July 17, 2012)

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0. Threshold note on sources (please read first)

The task instructs me to “use the results from the Prior Art section of this page.” There is no separately labeled “Prior Art” section in the materials supplied to me. The authoritative full text I was given (the Google Patents mirror at https://patents.google.com/patent/[US8224322](/patent/US8224322)/en) contains no “Prior Art” heading, no Background discussion of specific references, and no “References Cited” block in the body. What the patent’s public pages do provide are:

1. the “References Cited” list on Justia (https://patents.justia.com/patent/8224322) — the actual U.S. patent documents cited by the Examiner/applicant; and
2. the “Similar Documents” / related-art lists surfaced by Google Patents and by the Unified Patents portal entry (https://portal.unifiedpatents.com/patents/patent/US-8224322-B2).

Rather than fabricate a “Prior Art section,” I have treated those retrieved lists — plus the standards-level art that any POSITA in 2006 would have had (GSM/ANSI‑41 MAP and 3GPP GLR) — as the prior-art universe. Flag for the record: if a distinct Prior Art section exists on the page you are working from, it was not delivered to me, and my analysis should be re-run against it. Everything below is labeled by source and date so it can be checked.

I also carry forward, and rely on, the earlier-generated sections: the granted claim 1 recitation (reproduced in full on RPX: https://litigation.rpxcorp.com/patent/[US8224322B2](/patent/US8224322B2)) and the flagged publication-vs-grant claim discrepancy. That discrepancy matters here: the obviousness attack is run against the granted claims (1 and 17), not the broader published claims.

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1. Legal framework applied

• The application was filed June 12, 2006, so pre‑AIAA 35 U.S.C. § 103(a) governs, with § 103(c) alive as a potential disqualifier of commonly owned art (see § 7.3 below). No effective filing date later than 2006‑06‑12 is apparent on the face of the record I retrieved, so no post‑AIA “reasonable expectation”/“additional element” nuance applies.
• I apply Graham v. John Deere: scope/content of the claims, scope/content of the prior art, level of ordinary skill, and secondary considerations. Obviousness is a question of law with underlying facts.
• Level of ordinary skill: a POSITA here would hold a B.S. in electrical engineering or computer science (or equivalent) and ~3–5 years in wireless network engineering, with working familiarity with: GSM/ANSI‑41 MAP location management (HLR/VLR/MSC), SS7/TCAP signalling, softswitch/SIP packet telephony, and IP routing/peer‑to‑peer networking. This is the level the references themselves assume.
• Rationales for combining are drawn from MPEP 2143 and KSR Int’l v. Teleflex (combining familiar elements according to known methods; use of a known technique to improve a similar device; design incentives/market forces). I identify the articulated reason for each combination, since motivation must be supported by the prior art as a whole.

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2. The actual inventive subject matter to be overcome

Granted claim 1 (as reproduced on RPX) requires, in substance:

Granted claim 17 is the system counterpart (first DMA node + second DMA node + VLR gateway, same functional relationships).

The core novelty being tested is therefore narrow and specific: a “VLR gateway” that is physically separate from the DMA nodes, is interposed between the DMA network and the macro MSC/HLR, and stores a mapping of visiting subscriber identity → IP address of the serving DMA node, with that mapping populated by registration traffic relayed through a peer DMA node.

Everything else in claim 1 — a distributed base-station node containing MSC + BSC, an IP peer-to-peer inter-node network, per-node VLRs, IMSI/ESN identifiers, registration acknowledgements — was old and well documented by 2006, much of it by Lemko’s own earlier publications.

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3. The relevant prior art (with dates and provenance)

3.1 Third-party art that is squarely on point

3.2 Lemko / Pan-family art (self-art) — usable only with the § 103(c) caveat

Observation for the record: The Lemko/Pan family art (US 2006/0098661, US 7,840,230, US 2006/0234747/74, and the 2008‑2009 Pan applications listed as “other references” on ’230) discloses every element of claim 1 except the remote, aggregated VLR gateway keyed to a DMA node’s IP address and coupled to the macro network element. That gap is exactly what the third-party GLR/Wi‑Fi‑gateway‑VLR art fills. In other words, the ’322 patent sits at the arithmetic intersection of (a) Lemko’s own distributed-MSC/BSC-over‑IP architecture and (b) the pre-existing “gateway register” concept — a combination the art strongly suggests.

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4. Element-by-element mapping and the primary § 103 combinations

The following table maps each claim‑1 limitation to the combination 3GPP TS 23.119 (GLR) + US 6,795,444 (packet-switched cellular/softswitch) + US 2004/0014466 (distributed radio processing) [+ optional US 2004/0204097 Internet base station], with US 7,738,488 (Wi‑Fi gateway VLR) as an alternative or supplementary reference for the gateway‑VLR coupling.

4.1 The strongest theory — Reference Set A

3GPP TS 23.119 (GLR) + US 6,795,444 (Vo) + US 2004/0014466 (Jesse)

Articulated reason to combine (the why, supported by the references themselves):

1. Same problem, same solution type. TS 23.119 exists because “a significant increase in the number of roaming users … will lead to an increase of the signalling traffic on ‘short-haul’ and ‘long-haul’ international links.” Lemko’s ’322 background describes an almost identical economic driver — rural/multi-site cellular coverage where a full MSC/BSC/HLR-VLR core is economically infeasible and inter-site backhaul is the cost bottleneck. A POSITA seeking to attach a network of small distributed nodes to an existing carrier’s MSC/HLR would naturally reach for the one standardized mechanism designed to make a visited network appear to the home network as a single register — the GLR.
2. Both are “aggregate-the-VLRs-at-the-edge” designs. TS 23.119 states the GLR “interacts with multiple VLRs” and, on first Update Location, “stores the VLR Number and serving MSC Number.” Mapping that onto an IP-based distributed RAN (US 6,795,444; US 2004/0014466) yields precisely claim 1.5 and 1.7. Substituting an IP address for the SS7 VLR/MSC identifier is an art-recognized design choice — KSR / MPEP 2143(B).
3. The “via the second DMA node” relay is a predictable networking step. The GLR already relays VLR↔HLR traffic; US 6,795,444 and US 2004/0014466 place the nodes on a shared packet network; and the second node is the one with the gateway coupling. Routing an Update-Location-equivalent through a peer node with the backhaul is precisely the kind of “application of a known technique to a known device ready for improvement” (MPEP 2143(D)).
4. Predictable result, no new technology required. Every element is a known register, known signalling, known IP transport. The combination yields nothing more than the expected result of putting a GLR-style aggregator in front of a distributed IP RAN: (i) the macro HLR sees one visited register, (ii) the macro MSC can route terminating calls to the correct DMA node, (iii) backhaul signalling is minimized.

4.2 Alternative/parallel primary theory — Reference Set B

US 7,738,488 (Marsico/Tekelec “gateway VLR”) + US 6,795,444 (Vo) + US 2004/0204097 (Scheinert “Internet base station”)

Here the “gateway VLR” is not borrowed from the 3GPP GLR but from Tekelec’s Wi‑Fi gateway VLR, which already discloses (a) a gateway performing VLR functions for access points, (b) receiving a registration request from a subscriber in an access point’s service area, (c) interworking with the cellular HLR, and (d) storing the subscriber’s information and reachability information. Motivation: US 7,738,488 itself is directed to the problem of extending cellular registration/termination into an alternative access network while reusing the incumbent HLR — the same commercial purpose as the DMA network. The only step left is substituting a DMA node for the Wi‑Fi access point and its node IP address for the Wi‑Fi reachability address, which is a simple substitution of analogous, art-recognized network elements (MPEP 2143(B); In re Keller).

4.3 Third primary theory — Reference Set C (distributed-server lineage)

EP 0 708 571 (NTT distributed control) + TS 23.119 (GLR) + US 2003/0104828 (Nguyen distributed VLR) + US 2004/0014466 (Jesse)

• EP 0 708 571 supplies the “separate servers for call control and connection control,” the VLR servers that track only roaming mobiles, and the direct signalling links between servers/base stations in different networks — i.e., limitation 1.1 and the flexibility to relay (1.3) without an anchored MSC.
• US 2003/0104828 supplies the express idea of a VLR controller/address pointer identifying which VLR site holds the record — the precursor of “store an IP address of the serving DMA node” (1.5/1.7).
• TS 23.119 supplies the gateway-register-at-the-network-edge aggregator coupled to the HLR (1.4, 1.8).
• Motivation: all three address the same two goals — decentralizing the switch while keeping the home network from having to track every visited node individually. Combining them is the predictable union of complementary teachings, not a bodily incorporation concern (KSR).

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5. Dependent claims

Because I could not retrieve the complete official dependent-claim listing from USPTO PatentCenter (a caveat carried forward from the earlier section), I address the dependent themes identified in the granted-claim discussion:

Claim 17 (system) rises or falls with claim 1. The references already disclose the structural apportionment (first node, second node, gateway separated from the nodes). Under KSR, structuring known functions across known components in a distributed system is not inventive where the allocation is dictated by the function.

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6. Is there any single-reference (§ 102) theory?

Not cleanly. No single retrieved reference discloses all of (i) a multi-site DMA/DMA-node network with an embedded MSC+BSC per node, (ii) per-node VLRs, and (iii) a separate, aggregated VLR gateway storing the serving node’s IP address, coupled to the macro MSC/HLR. TS 23.119 is silent on the distributed-RAN implementation; US 6,795,444 is silent on a gateway register at the network edge; US 7,738,488 is silent on a multi-node, multi-site architecture with per-node VLRs and peer relay. Hence § 103, not § 102, is the correct attack — which is also why the ’322 survived prosecution.

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7. Counterarguments, weaknesses, and defensive considerations

7.1 Lemko’s likely rebuttals

• Teaching away / different problems. Lemko may argue the GLR exists to reduce inter-PLMN signaling between carriers, whereas the ’322 addresses intra-network roaming among cheap rural nodes. Rebuttal: the ’322 background frames the problem in terms of deployment cost and backhaul economy, and TS 23.119 frames its own problem in backhaul/signalling economy; the articulated reason (“reduce location-management signalling across a network boundary by aggregating at a gateway”) is the same reason and is expressly stated in TS 23.119. KSR rejects rigid “different problem” defenses where the references address the same underlying need.
• No motivation to modify a DMA node to use a relay. Rebuttal: the second DMA node is, by the ’322’s own description, the node coupled to the gateway; relaying through it is dictated by the topology.
• Objective indicia. Lemko could point to the Motorola covenant not to sue (2012‑02‑21) and the 2012 white paper listing products covered — hallmarks of commercial significance/praise. But (a) the record I retrieved ties the Motorola covenant to the ’988 patent, not ’322 (see the earlier Litigation Summary), and (b) nexus would have to be proven between the success and the VLR-gateway IP-address mapping specifically, not to the DMA product family as a whole. I found no evidence of a nexus for ’322 in the retrieved materials, and no objective-indicia record at all. I do not know whether third-party praise or licensing specifically attributable to ’322 exists; treat objective indicia as an open factual question.

7.2 The “first-to-invent” timing wrinkle

Because the ’322 was filed June 12, 2006, Lemko retains the possibility of swearing behind a reference by proving an earlier invention date (pre‑AIA § 1.131). The most dangerous third-party art (TS 23.119) is a 2000 publication, so no swear-behind is possible against it. US 2006/0079228 (Marsico) published only April 13, 2006, so a Rule 131 declaration could in principle reach behind it — but the underlying Tekelec provisional date is September 15, 2004, and the specification content would likely still be available as prior art through the granted US 7,738,488 (filed 2005‑09‑15). Net effect: the GLR art alone is timing-proof.

7.3 § 103(c) common-ownership disqualification — a real limit on the attack

Several otherwise-perfect references are Lemko/Pan self-art (US 2006/0098661, US 7,840,230, US 2006/0234747/74). Under pre‑AIA § 103(c), subject matter that qualifies as prior art only under § 102(e), (f), or (g) and that was commonly owned at the time the ’322 invention was made cannot be used in a § 103 rejection. Because those Lemko applications were owned by Lemko Corporation and the ’322 was also Lemko’s, they are presumptively disqualified for § 103 purposes. Practical consequence: a robust obviousness challenge should be built on the third-party references (TS 23.119; US 7,738,488; EP 0 708 571; US 6,795,444; US 2003/0104828; US 2004/0253949; US 2004/0014466; US 2004/0204097; US 2002/0058502; US 2001/0036173), with the Lemko self-art used only as background/evidence of the state of the art or of what a POSITA knew, not as the statutory reference. This is the key drafting discipline for any IPR/PGR-style petition.

• Caveat: if any Lemko self-art published more than one year before the ’322 filing (or otherwise qualifies under § 102(a)/(b)), the § 103(c) disqualification would not apply to that reference. On the dates I retrieved, US 2006/0098661 (published 2006‑05‑11) is only one month pre-filing, so it is not § 102(b) art; it would be § 102(a)/(e) art at best, and § 102(a) art requires publication before the applicant’s invention date — which Lemko can likely establish as before May 11, 2006. Verify the actual publication/invention dates before relying on it.

7.4 Claim-construction exposure

The granted claim’s “via the second DMA node” and “VLR gateway is located at a different location than the first DMA node” are the limitations most likely to be pressed in a validity dispute. They should be construed narrowly against Lemko (the gateway must be outside the first node; relaying must pass through a peer node), because the GLR/EP‑0708571 art maps cleanly only under the broader reading. Conversely, Lemko will argue the relay-through-a-peer-node combination is not taught. That is the single most contestable element — and it is also the element the ’322 specification itself calls out as the second node being “coupled to the VLR gateway,” which supplies the motivation to route through it.

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8. Conclusion

1. Claim 1 and claim 17 are vulnerable under pre‑AIA § 103(a). The strongest, timing-proof, third-party combination is:

   3GPP TS 23.119 (GLR – Stage 2, 2000) in view of US 6,795,444 (Vo et al.) and US 2004/0014466 (Jesse et al.), optionally further in view of US 2004/0204097 (Scheinert, “Internet base station”).
   Either reference set supplies the “VLR gateway” (aggregating register between the visited nodes and the HLR, storing the serving node’s identity), and the second supplies the distributed MSC/BSC-over‑IP base-station network. The only remaining step — using an IP address as the serving-node identifier and relaying via a peer node — is an art-recognized substitution and a topology-dictated routing choice.

2. Alternative independent combinations that also render the claims obvious:

   • US 7,738,488 (gateway VLR) + US 6,795,444 + US 2004/0204097;
   • EP 0 708 571 + TS 23.119 + US 2003/0104828 + US 2004/0014466;
   • US 2004/0253949 (platform-associated VLRs) + US 7,738,488 + US 6,795,444.

3. Motivation is express and economically grounded in the references themselves (TS 23.119’s stated purpose of cutting inter-network location-management signalling for roamers; US 7,738,488’s purpose of extending cellular registration into an alternative access network while reusing the HLR) — satisfying the KSR/MPEP‑2143 “articulated reason” requirement without hindsight.

4. Caveats that materially affect any filing: (a) use third-party art as the statutory references and treat Lemko/Pan self-art as background only because of § 103(c); (b) the “via the second DMA node” and “different location” limitations are the contested ground and should be construed narrowly; (c) the full official dependent-claim set was not retrievable in this session, so the dependent-claim analysis above is thematic and must be re-run against the certified claim listing; and (d) no objective-indicia record (nexus evidence for ’322 specifically) was found, which leaves that Graham factor genuinely open.

5. Standing uncertainty I will not paper over: the task refers to a “Prior Art section of this page,” which was not present in the material provided to me. I have substituted the patent’s own cited-reference and similar-document lists plus the standard/patent art a POSITA would have had. If a different, curated prior-art list exists, my combinations should be re-mapped to it — the mapping table in § 4 is designed so that substitutions can be made element-by-element without redoing the motivation analysis.

Sources cited: https://patents.google.com/patent/US8224322/en ; https://patents.justia.com/patent/8224322 ; https://litigation.rpxcorp.com/patent/US8224322B2 ; https://www.etsi.org/deliver/etsi_ts/123100_123199/123119/03.00.00_60/ts_123119v030000p.pdf ; https://www.3gpp.org/ftp/tsg_cn/TSG_CN/TSGN_06/tdocs/PDF/NP-99478.PDF ; https://patentimages.storage.googleapis.com/33/dc/b8/f298d86f8907f2/US7738488.pdf ; https://insight.rpxcorp.com/patent/US20060079228A1 ; https://patentimages.storage.googleapis.com/4a/29/c6/27f834a41d6c19/EP0708571A3.pdf ; https://www.freepatentsonline.com/y2003/0104828.html ; https://www.freepatentsonline.com/y2006/0098661.html ; https://patents.google.com/patent/US7840230/en ; https://patents.justia.com/patent/[7840230](/patent/7840230) ; https://portal.unifiedpatents.com/patents/patent/US-8224322-B2.