US 5722067

I'll research US 5,722,067 across patent databases and the litigation dockets as requested.

Let me check specifically for any Federal Circuit (CAFC) proceedings and the current legal status.

Search scope and confidence statement

I searched for US 5,722,067 in patent databases (Google Patents, Justia, USPTO.report, Espacenet/WO search reports), litigation databases (Stanford NPE Litigation Database, Unified Patents, CourtListener/Casetext), and general web sources for any Federal Circuit activity.

Key negative finding: I found no CAFC 2026 docket, appeal, or proceeding involving US 5,722,067. Every litigation hit for this patent is from 2000–2007, and the patent's own record shows "Anticipated expiration" on 2015‑02‑24 and status "Expired – Lifetime." The most recent court activity I could locate is the 2006 settlement and the 2006–2007 E.D. Tex. / D. Ariz. filings. If a 2026 CAFC docket exists, it is not indexed in any source I can reach, and I will not fabricate one. Treat the "CAFC 2026" portion of your request as unconfirmed / not found.

Bibliographic data (US 5,722,067 A)

Assignment chain (from the public record): Cellular Express, Inc. (1994) → Cellexis International, Inc. (1996, change of name) → Freedom Wireless, Inc., a Nevada corp. (1997) → CF Capital Limited (1999) → Orbital Sciences Corporation (2008, employee non‑disclosure/assignment, Harned) and Ericsson, Inc. (2008, license from Orbital Sciences).

Family: CIP US 5,854,975; continuation US 6,157,823; and later continuations US 6,236,851, US 2001/0021648 A1, US 2007/0243856 A1, US 2010/0009654 A1 — all claiming priority to 1994‑12‑23.

Abstract (verbatim)

"A cellular telecommunications system having a security feature which allows only pre-authorized users no [sic] complete cellular telephone calls. The system and method recognizes a cellular radiotelephone's pre-programmed a pre-selected telephone number and a automated number identification code (ANI). The pre-selected telephone number is reserved to the pre-paid cellular telecommunications system. The cellular radiotelephone transmits the ANI and a dialed number identification system code (DNIS) to a cellular switch, which contacts a host computer for call validation the pre-paid service provider."

Independent claims — plain-language overview

The patent has 21 claims; the independent claims are 1, 2, 10, and 15.

Claim 1 — Method of cellular telecommunications (transparent prepaid outgoing calls)

A multi-step method covering the full lifecycle:

• (a)–(b) establish a prepaid subscriber account balance tied to a pre‑assigned cellular number and write it to a database;
• (c) the subscriber just dials the destination number and hits send — the phone transmits the destination as a DNIS code and the phone's unique ANI;
• (d)–(f) the cellular switch recognizes the ANI as prepaid, goes off‑hook to a host computer, and the host computer serially "winks" the switch to pull the DNIS (first signal) and then the ANI (second signal);
• (g) host computer talks to a remote server holding the subscriber database and validates the ANI;
• (h) validates there is a sufficient prepaid balance based on DNIS and time of day;
• (i) only if (h) is affirmative, the host establishes a line to the local exchange carrier (LEC) and outpulses the DNIS;
• (j) on off‑hook at the destination, the account balance is decremented at regular intervals for the duration of the call (i.e., real‑time periodic debiting, not a single up‑front timer);
• (k) the host disconnects on failed validation or on‑hook.

This is the core "transparency + real‑time periodic validation" claim.

Claim 2 — System for prepaid subscribers (apparatus claim)

A system comprising: (a) cellular telephones capable of transmitting an ANI; (b) a cellular switch; (c) a LEC; and (d) a prepaid service provider having —

• (1) a host computer coupled to the LEC via switched lines and to the cellular switch via unswitched lines;
• (2) a remote-from-the-host server computer with an ANI‑keyed database of prepaid accounts and balances;
• (3) means in the host for receiving a call‑pending signal from the switch and forwarding the call to the LEC after confirming the ANI's balance exceeds a predetermined minimum.

Architectural significance: the cellular switch forwards prepaid calls to the third‑party prepaid provider over unswitched (dedicated, e.g., T1) lines, and the prepaid provider — not the carrier — hands the call to the LEC.

Claim 10 — Method for prepaid cellular service (streamlined method)

Forward DNIS + ANI to a prepaid switching system; at that system verify a positive balance for the ANI‑identified account; forward the call to an LEC; and decrement the balance at regular intervals during the call until termination or until the balance is no longer positive.

Claim 15 — Method at the cellular switch (routing/identification claim)

At the cellular switch: receive the ANI representing the call; check the ANI against stored reserved prepaid cellular telephone numbers identifying prepaid subscribers; and if found, forward the call directly to a prepaid service provider. (This is the "identify‑and‑reroute at the switch" concept.)

Dependent claims

• 3–9 depend from claim 2 (land‑lines; LAN vs. WAN; RAID mass storage; host memory storing/revising account info during the call; sending revised balances back to the server; terminating when balance ≤ minimum).
• 11–14 depend from claim 10 (finding the ANI; retrieving balance; remote database via a remote server; sharing database access with other prepaid switching systems; terminating at zero balance).
• 16–21 depend from claim 15 (verifying balance at the provider; forwarding to a telecom service provider; periodic decrementing; terminating at zero; validating ANI against reserved numbers; remote/shared database access).

Legal / litigation history (for context)

• Freedom Wireless, Inc. v. Boston Communications Group, Inc., D. Mass. No. 00‑12234 (also 1:05‑cv‑11062, 1:00‑cv‑12234). 51‑day jury trial; verdict of joint infringement of the '067 and '823 patents, $128,025,000 (reported as $122M vs. BCGI/Cingular, plus amounts vs. AT&T Wireless, Western Wireless, CMT); willfulness found against BCGI. Inequitable conduct allegations (Cominex brochure, CSI proposal, Klepp article, Wise patent application) were rejected — 390 F. Supp. 2d 63 (D. Mass. 2005). The case settled in July 2006.
• GTE Wireless, Inc. v. Cellexis Int'l, Inc. / Freedom Wireless, 1st Cir. No. 02‑2174 (Aug. 14, 2003) — covenant‑not‑to‑sue / standing fight over the same patent family. (Note: this opinion refers to the second patent as the "'828 patent"; the database and other opinions identify that family member literally as US 6,157,823. I am not auto‑correcting the opinion's text — I flag the discrepancy.)
• Freedom Wireless, Inc. v. Alltel Corp. et al., E.D. Tex. 2:06‑cv‑00504, 2:06‑cv‑00505, 2:07‑cv‑00151, 2:07‑cv‑00152; D. Ariz. 2:06‑cv‑01935 (Cingular v. Freedom Wireless declaratory judgment).
• Claim construction (Markman, April 23, 2003) — Freedom asserted claims 10–18 of the '067 patent in the BCGI case. A central dispute was the construction of "ANI", with the specification stating: "the cellular radiotelephone's electronic serial number (ESN) may be transmitted instead of the ANI. The ANI is referenced, herein only by way of example" (col. 7:62‑66) — supporting a broad functional reading that could encompass ESN/MIN.
• SOX/fraud angle: the patent's own classification includes H04W 12/126 (protection against SIM cloning), reflecting the anti‑cloning/anti‑fraud purpose stated in the specification.

Caveats and uncertainties

1. No CAFC 2026 docket found. I cannot confirm any 2026 Federal Circuit activity. Given the 2015‑02‑24 expiration, an appeal in 2026 is highly implausible; the absence of hits is consistent with a dead case, not a search failure.
2. Assignee ambiguity. Google Patents' "Current Assignee" (CF Capital Ltd / Orbital Sciences LLC) is explicitly flagged as potentially inaccurate, and the assignment records are consensual rather than court‑adjudicated. Freedom Wireless, Inc. is the original assignee and the party that litigated.
3. Inventor ordering differs between sources (Fougnies/Harned vs. "Harned Dan B et al."); both names are consistently the sole named inventors.
4. Source quality warning: one search result titled "Complaint analysis" (an apparent AI‑generated summary on a third‑party site) mislabels an incoming‑call claim as "'067 patent, Independent claim 1." That is incorrect — the incoming‑call material in this family appears in the continuation US 6,157,823, and '067 claim 1 is the outgoing‑call method described above. I did not rely on that source for the claim summary; the claim text above is taken from the authoritative Google Patents/Justia full text.

If you specifically need the 2026 CAFC docket verified, the authoritative check would be PACER/CM‑ECF for the Federal Circuit and the Federal Circuit's own daily docket — neither of which is reachable through the searches I ran. I'd rather flag that gap than assert a docket number I cannot verify.

I'll research litigation involving US 5,722,067 using multiple sources.

Let me gather more specifics on each case, outcomes, and the Federal Circuit appeal.

Let me pin down the remaining case details and outcomes.

Litigation Involving U.S. Patent No. 5,722,067

Patent identity (as confirmed in sources): U.S. 5,722,067, "Security cellular telecommunications system," inventors Douglas V. Fougnies and Dan B. Harned, application 08/364,479, filed 1994-12-23, granted 1998-02-24, original assignee Freedom Wireless Inc. (originally assigned to Cellular Express, Inc., renamed Cellexis International, Inc., then Freedom Wireless). Claimed priority date 1994-12-23. Google Patents flags the family as having litigation and lists the litigation entries reproduced below. The patent is marked Expired – Lifetime, with anticipated expiration 2015-02-24, so no litigation can currently be pending on it.

Two independent databases were consulted for this patent specifically:

• Google Patents' own litigation section for US5722067: https://patents.google.com/patent/US5722067/en
• Stanford NPE Litigation Database, patent 5722067: https://npe.law.stanford.edu/patent/5722067
• Unified Patents litigation case list (filter "Patents in Case: 572206"): https://portal.unifiedpatents.com/litigation/caselist?patents=572206

1. Freedom Wireless, Inc. v. Boston Communications Group, Inc. et al. — the principal case

2. Freedom Wireless, Inc. v. Boston Communications Group, Inc. et al. (second D. Mass. action)

3. Cingular Wireless LLC and Ericsson Inc. v. Freedom Wireless, Inc. (declaratory judgment)

4. Freedom Wireless, Inc. v. Alltel Corporation et al.

5. Freedom Wireless, Inc. v. Cingular Wireless LLC et al.

6. Freedom Wireless, Inc. v. American Cellular Corp. et al.

7. Freedom Wireless, Inc. v. SunCom Wireless Operating Company LLC et al.

8. Additional foreign/family litigation flag

Google Patents also records a "First worldwide family litigation filed" entry for Darts-ip family ID 23434704 (https://patents.darts-ip.com/?family=23434704) tied to US5722067. I was not able to retrieve the underlying case details (parties, forum, outcome) for that entry, so I cannot report it with confidence.

Summary of what is known vs. not known

Confirmed outcomes/status:

• The '067 patent was litigated principally as part of the Freedom Wireless v. BCGI dispute, culminating in a May 20, 2005 D. Mass. jury verdict (reported at $128M, later cited as $148M), a permanent injunction ordered Oct. 17, 2005 and stayed by the Federal Circuit Dec. 12, 2005, and a July 2006 settlement in which BCGI paid $55.3M and Freedom dropped claims against BCGI's carrier customers.
• The D. Ariz. declaratory-judgment action by Cingular and Ericsson survived a motion to dismiss (June 26–27, 2007) on MedImmune grounds, then closed.
• Five connected E.D. Tex. actions were filed in Nov. 2006 and Apr. 2007 and are all shown as "Closed."
• The patent expired Feb. 24, 2015; no litigation can be pending now.

Not verified / expressly uncertain:

• Whether the 2005 D. Mass. action (1:05-cv-11062) is truly a separate case from the 2000 case or a docketing artifact of the same dispute.
• The precise termination dates of the E.D. Tex. cases (sources give 2009 vs. 2010 for 2:06-cv-00504) and whether they ended by settlement, license, voluntary dismissal or judgment — no merits judgment or damages award was located for those cases.
• Whether the Freedom Wireless lawsuits referenced in the Leap Wireless (Dec. 10, 2007) and T-Mobile (Jan. 7, 2008) SEC filings assert the '067 patent specifically; those filings appeared in search results but I could not confirm the asserted patents or case numbers.
• Whether any ex parte or inter partes reexamination of the '067 patent was filed (a common companion to this litigation); my searches were cut short and I did not confirm any.

Methodological caveat: The Stanford NPE Litigation Database lists only three cases for patent 5722067, while Google Patents/Unified Patents list five distinct suits. The databases' coverage differs, so the list above is the union of what each source attributes specifically to U.S. 5,722,067.

I'll start by verifying the structured data against the public record, then search for any PTAB activity not captured in the ODP ingest.

PTAB proceedings overview

No AIA trial proceedings are on file for US 5,722,067. The structured "PTAB proceedings on file" block for this patent (USPTO Open Data Portal) returns zero IPRs, zero PGRs, and zero CBM reviews, and my independent web checks surfaced no petition, institution decision, FWD, or Board paper naming this patent as the subject patent of an AIA trial.

Bottom line for a defendant: the defensive posture is the unfavorable one — the patent was never stress-tested at the Board, so claims 1–21 remain facially intact and there is no FWD you can point to for a "claim 1 is dead" argument. Your leverage comes from the patent's expiration on 2015-02-24 and the deep, publicly documented district-court claim-construction record, not from any IPR kill shot. Any demand letter you receive today is almost certainly limited to pre-expiration damages under 35 U.S.C. § 286, not ongoing infringement.

Proceedings on file

None — no IPR / PGR / CBM proceeding identified

• Type: N/A (no Inter Partes Review, Post-Grant Review, or Covered Business Method review on record)
• Filed: N/A
• Status: No AIA trial proceeding on file (ODP structured data); nothing contradicting that found via web search
• Judge panel: N/A
• Petition grounds: N/A
• Institution decision: N/A
• Final Written Decision: N/A
• Settlement / termination: N/A
• Appeal: No PTAB-to-Federal-Circuit appeal is on record for this patent. (District-court appeals existed in the underlying litigation — see below — but those are Article III appeals, not PTAB appeals.)
• Defensive value: Because there is no FWD, you cannot rely on § 315(e)(2) or on a prior Board cancellation to shorten the case. Your invalidity case must be built in the district court, and the patent expires 2015-02-24, which caps the exposure to a § 286 six-year back-damages window.

Adjacent matters I checked (not PTAB AIA trials – included so you don't mistake them for one)

1. Ex parte reexamination / PTAB reexam appeals: I found no ex parte or inter partes reexamination certificate for the '067 patent in the sources available to me. I cannot confirm one exists — treat this as an open item to verify in Patent Center / the file wrapper, not as a negative finding. (Note that a reexam appeal to the PTAB is not an AIA trial and would not appear in the ODP AIA-trial list.)
2. District-court claim construction, Freedom Wireless, Inc. v. Boston Communications Group, Inc., D. Mass. No. 1:00-cv-12234 (filed 2000-12-29; later-captioned proceedings into 2005). Markman order dated 2003-04-23. Freedom asserted claims 10–18 of the '067 patent and claims 1–3, 5, 9–12, 15–20, 24–25, 27–31, 34–39, 42, 53, 57 and 59 of the '823 patent. The court construed "call" to mean "a telephone call, which includes voice data" and construed "wireless switch"/"cellular switch" as "the MTSO (mobile telephone switching office) or MSC (mobile telephone switching center)." Freedom obtained favorable infringement and invalidity verdicts; the case settled on appeal. Source: https://ipmall.law.unh.edu/sites/default/files/hosted_resources/Markman/pdfFiles/2003.04.23_1_FREEDOM_WIRELESS_INC_v._BOSTON_COMMUNICATIONS_GROUP.pdf and https://storage.courtlistener.com/harvard_pdf/[2533800](/patent/2533800).pdf (standing/ownership decision, Harned–Orbital employment-agreement dispute).
3. Freedom Wireless, Inc. v. Alltel Corp. et al., E.D. Tex. No. 2:06-cv-00504 (filed 2006-11-30), with parallel E.D. Tex. actions 2:06-cv-00505, 2:07-cv-00151, 2:07-cv-00152 and D. Ariz. 2:06-cv-01935 (see the litigation links in the Google Patents record). Claim construction issued 2008-10-17, again construing "call" as including voice data and adopting the MTSO/MSC construction; the court noted the plaintiff's expert had taken a contrary position in the earlier D. Mass. case and analyzed estoppel on that point. Source: https://www.ipmall.info/sites/default/files/hosted_resources/Markman/pdfFiles/2008.10.17_FREEDOM_WIRELESS_INC_v._ALLTEL_CORPORATION.pdf and https://cases.justia.com/federal/district-courts/texas/txedce/2:2006cv00504/[100133/332](https://assignmentcenter.uspto.gov/search/patent/reelFrameDetail?reelFrame=100133-0332)/0.pdf
4. Family: continuation-in-part US 5,854,975 (filed 1995-11-15); continuation US 6,157,823 (filed 1998-01-20); further continuations US 6,236,851 and later family members. Any future validity analysis should treat the '823 patent as the more dangerous assertion vehicle because its incoming-call claims survived the same litigation gauntlet — but note the same Markman constructions apply.

Strategic summary

Claim status. There is no canceled/sustained/untested line to draw from PTAB outcomes for US 5,722,067, because no PTAB trial ever reached a Final Written Decision on it. All 21 issued claims — independent claims 1, 2, 10, and 15, plus dependents 3–9, 11–14, and 16–21 — are neither PTAB-canceled nor PTAB-sustained. They are, in the only sense that matters here, untested at the Board. The patent file shows a grant/expiration timeline of 1998-02-24 (grant) to 2015-02-24 (anticipated expiration) (https://patents.google.com/patent/US5722067/en), so any live controversy is about historical damages only.

Estoppel landscape. Section 315(e)(2) estoppel is a non-issue: with no IPR petitioner, nobody is estopped, and correspondingly nobody has a free "the Board already killed these claims" defense either. Every prior-art ground — including art cited in the D. Mass. and E.D. Tex. cases and any art I have not seen — remains theoretically available in litigation. Two practical bars matter more than estoppel: (i) PGR was never available (the '067 patent predates the AIA by 15 years) and (ii) CBM review sunset for new petitions on 2020-09-16, so that door is closed. An IPR against an expired patent is not categorically forbidden, but its remedial value is minimal given the patent is in the public domain and only back damages are at stake.

Pattern signals. This family is an NPE-style assertion vehicle with a long litigation tail rather than a PTAB-tested patent: the Stanford NPE Litigation Database lists three cases on the '067 patent alone (D. Mass. 1:05-cv-11062; E.D. Tex. 2:06-cv-00504; plus the 2000 D. Mass. case analyzed above) — see https://npe.law.stanford.edu/patent/[5722067](/patent/5722067). Ownership passed Freedom Wireless → CF Capital Limited (recorded 1999-05-24) and there are recorded license/assignment events involving Orbital Sciences Corp. and Ericsson, Inc. (2008-08-07). I found no Unified Patents or other defensive-aggregator IPR against the '067 patent, and no evidence of repeated petitions by the same petitioner — consistent with the entire assertion wave occurring before IPR practice matured.

Recommended next steps

• Do not build a defense on a nonexistent FWD. There is no claims-invalidated disposition to cite. If a demand letter from anyone claiming the '067 patent arrives, the first response is a § 286 damages limitation and expiration argument (expired 2015-02-24), not a PTAB-based invalidity argument.
• Confirm the file-wrapper negative. Verify in USPTO Patent Center / the '067 file wrapper whether any ex parte or inter partes reexamination was ever requested or ordered. I could not confirm one, and a reexam certificate (if it exists) would change the claim picture even without an AIA trial.
• Mine the Article III record instead of the PTAB record. The 2003-04-23 (D. Mass.) and 2008-10-17 (E.D. Tex.) claim constructions — especially "call" = a telephone call including voice data, and "cellular switch" = MTSO/MSC — are the operative narrowing constructions and the most useful defensive assets this patent has. Prosecution-history and claim-construction estoppel arguments from the earlier case (the Alltel court expressly addressed the plaintiff's shift in position) may be available.
• Watch the family. The '823 patent (US 6,157,823) and the CIP US 5,854,975 share the same specification and the same litigation history; if you are being asserted against on '067, you are likely also exposed on the family, and those patents have their own (again, non-PTAB) records worth a separate pull.
• Absence is a signal, but read it correctly here. Normally, a heavily asserted patent with expired claims attracts no IPRs because (a) it is already expired and (b) its assertion window closed; that is the explanation here, not "the patent is so strong nobody bothered." Do not treat the empty PTAB docket as a validity endorsement.

Caveat on sourcing: the findings above are drawn from the Google Patents record for US 5,722,067, the Stanford NPE Litigation Database, the published Markman opinions linked above, and the ODP structured block supplied in the prompt. The CourtListener/Justia URLs point to the specific opinions I relied on. I was unable to complete verification of any reexamination history for this patent and flag that as unresolved rather than asserting a conclusion.

I'll research the assignment record and litigation history for US 5722067 before assembling the analysis.

Let me gather more on the specific assignment chain and litigation history.

Let me dig further into the CF Capital and Orbital Sciences links, plus try to locate reel/frame data.

Ownership & Assignment Analysis — US 5,722,067

Data-provenance caveat up front: US 5,722,067 does have recorded post-issuance assignments, so I proceed past the "no records" cutoff. However, in this session I was able to reach only the Google Patents legal‑events rendering of the USPTO assignment records and the associated litigation documents — not the Assignment Center detail view. Accordingly, reel/frame numbers and correspondent-of-record fields could not be retrieved, and I will not invent them. Every date below is the date as reported in the Google Patents legal‑events feed, which does not always distinguish execution date from recording date.

Inventors

Pattern notes (no "fire-sale precursor" pattern):

• Contrary to the classic "inventors bolt within 12 months" warning sign, neither inventor is recorded as transferring out. The anomaly here runs the other way: a third party (Orbital) claimed a competing ownership interest based on pre-filing employment, and that claim was still being papered into the public record 14 years after filing (2008‑08‑07). In Freedom Wireless, Inc. v. Boston Communications Group, Inc. (D. Mass. 2002), the court held Harned's Orbital covenant applied only to "inventions… in the Company's methods of conducting business," that prepaid wireless billing was outside that scope, and that Freedom Wireless was therefore the legal owner — denying BCGI's standing-based summary judgment motion.
• Harned is named individually as an assignor in a 2008 USPTO recording (see timeline), which is itself unusual and signals a retained/contested interest rather than a clean corporate chain.
• Family members share the same inventorship: continuation US 6,157,823 (US 09/009,199) and CIP US 5,854,975 (US 08/559,283), later continuation US 6,236,851 (US 09/118,378).

Original assignee

Freedom Wireless, Inc. is listed by Google Patents as the original assignee, and the printed patent issued 1998‑02‑24 after the 1997 transfer described below. The chain of title, however, begins with the predecessor:

• Cellular Express, Inc. (Arizona) — named as assignee in the earliest recorded assignment (1994‑12‑23), signed by both inventors.
• Renamed Cellexis International, Inc. (1996‑09‑27 change of name).
• Per GTE Wireless, Inc. v. Cellexis International, Inc., 341 F.3d 1, Cellexis later became Wireless Pathways, Inc.

Line of business / product: Freedom Wireless was not a cellular carrier or equipment maker. The Federal Circuit briefing in Freedom Wireless v. BCGI contains the heading "Freedom's Predecessors Try But Fail To Enter The Prepaid Wireless Market," and records that Cellexis licensed the technology to three companies at a 5¢/minute royalty before the first patent issued — two went bankrupt and the third never entered the market. The brief states Freedom "never saw a dime in revenue from those licenses." The company's documented revenue events are the 2005 jury verdict and the 2006 settlement. No product embodying the claims is evidenced as shipped.

Current status: Privately held; current corporate status (operating / dissolved) is not determinable from the sources reached. The patent itself expired 2015‑02‑24 ("Expired – Lifetime"), so no assertion is possible today regardless of record ownership.

Assignment timeline

Reel/frame and correspondent fields: not retrievable in this session (see caveat above). Conveyance types are quoted as recorded in the Google Patents legal‑events feed.

• 1994‑12‑23 (date as reported) — Reel not retrieved

  • Conveyance: Assignment of Assignors' Interest
  • Assignor: Harned, Dan B.; Fougnies, Douglas V.
  • Assignee: Cellular Express, Inc.
  • Correspondent: not retrievable
  • Context: founders assign the invention into the venture entity on the filing date.

• 1996‑09‑27 — Reel not retrieved

  • Conveyance: Change of Name
  • Assignor: Cellular Express, Inc., an Arizona corporation
  • Assignee: Cellexis International, Inc.
  • Correspondent: not retrievable
  • Context: change of name only — no change in beneficial ownership.

• 1997‑10‑07 — Reel not retrieved

  • Conveyance: Assignment of Assignors' Interest
  • Assignor: Cellexis International, Inc., an Arizona corporation
  • Assignee: Freedom Wireless, Inc., a Nevada corporation
  • Correspondent: not retrievable
  • Context: transfer of the IP out of Cellexis into the Freedom Wireless entity (the Federal Circuit brief frames this as "Freedom Acquires Cellexis's IP Rights"; Cellexis itself continued separately and became Wireless Pathways).

• 1999‑05‑24 — Reel not retrieved

  • Conveyance: Assignment of Assignors' Interest (Google Patents event code "AS")
  • Assignor: Freedom Wireless, Inc.
  • Assignee: CF Capital Limited
  • Correspondent: not retrievable
  • Context: indeterminate — see NPE signal 1. This is the single most anomalous link in the chain: Google Patents lists CF Capital Ltd among the current assignees, yet in litigation three years later the court held Freedom Wireless was the legal owner of the patents. That tension is consistent with a collateral/financing assignment rather than an outright conveyance, but I could not retrieve the conveyance text to confirm.

• 2008‑08‑07 — Reel not retrieved

  • Conveyance: License
  • Assignor: Orbital Sciences Corporation
  • Assignee: Ericsson, Inc.
  • Correspondent: not retrievable
  • Context: executed during the pendency of Freedom Wireless, Inc. v. Ericsson Inc. et al., 2:07‑cv‑00152 (E.D. Tex.), in which consent judgments were entered between Freedom Wireless and both Ericsson and Orbital Sciences. Effectively settlement papering.

• 2008‑08‑07 — Reel not retrieved

  • Conveyance: New Employee Non-Disclosure Agreement Including Assignment Provision
  • Assignor: Harned, Dan Bert
  • Assignee: Orbital Sciences Corporation
  • Correspondent: not retrievable
  • Context: Orbital perfecting its record claim to Harned's pre-filing employment covenant — the same agreement construed in the D. Mass. standing ruling. Recorded 14 years after filing, and on the same day as the Orbital→Ericsson license.

Family context (not assignments of this patent): CIP filed 1995‑11‑15 (US 5,854,975); continuation filed 1998‑01‑20 (US 6,157,823); continuation filed 1998‑07‑17 (US 6,236,851); later continuations filed 2001, 2006, 2009 — all claiming the 1994‑12‑23 priority date.

Timeline diagram

timeline
    title Ownership of US 5722067
    1994 : Filed and assigned to Cellular Express
         : Inventors Harned and Fougnies
    1996 : Name change to Cellexis International
    1997 : Assigned to Freedom Wireless Inc
    1998 : Patent issues Feb 24
    1999 : Assigned to CF Capital Limited
    2000 : First infringement suit filed
    2005 : Jury verdict of 128M against BCGI
    2006 : Settlement of 87M announced
    2007 : Suits against Ericsson Orbital and Alltel
    2008 : Orbital records Harned employment deal
         : Orbital grants license to Ericsson
    2015 : Patent term expires Feb 24

NPE / troll-pattern signals

1. Shell-entity transfer — Unclear (leans possible). The 1999‑05‑24 record moves the patent from Freedom Wireless, Inc. to CF Capital Limited, an entity for which I found no product, SEC filing, or operating footprint. A "Limited" suffix plus no commercial presence is suggestive, but naming alone is not a finding: I could not retrieve the recorded address, registered-agent, or the conveyance text, and the later litigation record shows Freedom Wireless suing as owner, which cuts toward a collateral/financing assignment. Flagged, not concluded.

2. Known asserter in the chain — Not present on the enumerated lists (Acacia, Marathon, Intellectual Ventures, IPNav, Wi‑LAN, Mosaid/Conversant, Vringo, Pendrell, Innovatio, MPHJ, Lumen View, Round Rock, Document Generation Corp, Spangenberg entities). Adjacent evidence only: Freedom Wireless appears in the Stanford NPE Litigation Database for this patent (https://npe.law.stanford.edu/patent/[5722067](/patent/5722067)), and its enforcement campaign is extensive and documented (below).

3. Repeat correspondent across the chain — Unclear / not determinable. The correspondent-of-record for each reel/frame entry is exactly the data point that would make or break this signal, and it was not retrievable in this session. Do not treat the absence as a negative finding.

4. Cascading transfers — Not present. No chained-LLC sequence. There is a factual clustering worth noting — the 1997‑10‑07 (Cellexis→Freedom Wireless) and 1999‑05‑24 (Freedom Wireless→CF Capital) transfers are ~20 months apart — but no shared-principal or shared-correspondent evidence exists to elevate it beyond that.

5. Pre-litigation transfer — Not present. The 1999‑05‑24 transfer precedes the earliest infringement suit (Freedom Wireless v. Bell Atlantic et al., filed 2000‑03‑29, N.D. Cal., later transferred to D. Mass.) by roughly 10 months — outside the 6‑month window. The 2008‑08‑07 recordings postdate the 2007 E.D. Tex. suits. Caveat: execution dates could shift this marginally; recording dates are all I have.

6. Bankruptcy fire-sale — Not present. No Chapter 7/11 by the assignee and no sale of this patent in a bankruptcy estate. The bankruptcies in the story are the pre-issuance licensees (two of Cellexis's three licensees), which did not involve a transfer of the patent. Separately, BCGI threatened bankruptcy in 2006 but settled for $87M in July 2006.

7. Privateering — Unclear. On 2008‑08‑07, Orbital Sciences Corporation — the operating aerospace company that employed inventor Harned — granted Ericsson, Inc. a recorded license to the patent, the same day Orbital recorded Harned's employment covenant. Both Orbital and Ericsson were defendants in Freedom Wireless v. Ericsson et al. (2:07‑cv‑00152) and both entered consent judgments. Whether this is Orbital asserting on Freedom's behalf, Orbital settling its claimed interest, or routine settlement papering cannot be established from the record reached.

8. Defensive aggregator — Not present. The chain does not terminate at RPX, AST, LOT Network, Unified Patents, or OIN. There is no neutralization signal.

Enforcement footprint (supporting context for signals 1–2 and the verdict)

US 5,722,067 was asserted across at least four venues, per Google Patents' litigation links and the Stanford database:

• N.D. Cal. → D. Mass.: Freedom Wireless v. Bell Atlantic/AirTouch/BCGI et al. (filed 2000‑03‑29); jury verdict 2005‑05‑20 of $128M against BCGI and carriers Cingular, AT&T Wireless, CMT Partners, Western Wireless; settled July 2006 for $87M.
• E.D. Tex. 2:06‑cv‑00504 and 2:06‑cv‑00505 (filed 2006‑11‑30): Freedom Wireless v. Alltel et al. — a defendant roster spanning 30+ carriers, resellers, and vendors (Alltel, US Cellular, Cricket, VeriSign, Comverse, Dobson, Cincinnati Bell, Bluegrass, and many small rural carriers).
• D. Ariz. 2:06‑cv‑01935 — declaratory-judgment action, in which the court found a case-or-controversy based on Freedom Wireless's own press statement that the verdict "sends a message to these defendants and any others who have been infringing."
• E.D. Tex. 2:07‑cv‑00151 and 2:07‑cv‑00152 — against Ericsson, SunCom, and Orbital Sciences; resolved by consent judgments (2007–2008).

Verdict

NPE — moderate confidence.

The recorded chain itself contains no shell-LLC cascade, no named NPE-list assignee, no proven correspondent recurrence, and no bankruptcy sale — but the operating facts point squarely at a non-practicing enforcement model: the patent was never embodied in a shipped product, the predecessor's three pre-issuance commercial licenses all failed (two licensees bankrupt, one never launched), and the resulting $128M verdict / $87M settlement plus a 30+ defendant multi-venue campaign were the only documented revenue. Add the unexplained 1999‑05‑24 assignment to CF Capital Limited with Freedom Wireless continuing to sue as owner, and the presence of the patent in the Stanford NPE Litigation Database. I stop short of "high confidence" because the two data points that would clinch it — the correspondent of record and reel/frame entries (particularly to determine whether CF Capital Limited's 1999 record is a title transfer or a collateral assignment) — were not retrievable in this session.

Verify at: https://assignment.uspto.gov/patent/index.html (search 5722067) and https://assignmentcenter.uspto.gov/ — cross-check with https://patents.google.com/patent/[US5722067A](/patent/US5722067A)/en#legalEvents. If a future pull shows a single attorney/firm of record across the 1997, 1999, and 2008 reel/frame entries, signal 3 flips to present and this verdict should be re-run as NPE — high confidence.

Nothing above is legal advice; the Google Patents legal-status field notes its own values are assumptions, not legal conclusions.

I'll research this systematically, starting with the USPTO record for US 5,722,067 and its cited prior art.

Let me pull the actual "References Cited" section from the patent's front page and Justia record.

The front-page "References Cited" list didn't surface in the first fetch. Let me target it directly.

Prior-Art Analysis — US 5,722,067

0. Identifier disambiguation (per your strict rule)

Searching the literal string "5722067" also returns JP 5722067 B2 (a Japanese granted patent, publication date 2015-05-20, citing JP 2000-95892, WO 2003-004552, JP 2008-110651). That is not the patent you asked about and is excluded from this analysis. All findings below concern only US 5,722,067 A.

1. Confirmed record for US 5,722,067

Sources: https://patents.google.com/patent/[US5722067A](/patent/US5722067A)/en ; https://patents.justia.com/patent/5722067 ; https://npe.law.stanford.edu/patent/5722067

2. Critical verification caveat (please read before using the tables)

You asked me to work from the USPTO citation record. I was not able to retrieve the front-page "(56) References Cited" block of US 5,722,067 from a primary source (USPTO PatentCenter image, Justia front page, or the Google Patents "Patent Citations" table) within this session. Two facts are worth noting:

1. The Google Patents rendering I retrieved contains a "Cited By (154)" block and a "Families Citing this family (36)" block, but no "Patent Citations" (backward-citation) block at all — and it does include the front-page field "Prior art keywords: cellular, paid, call, ani, host computer." The absence of a backward-citation table is circumstantial evidence that the granted patent's (56) list may contain no U.S. patent documents, but I cannot confirm this, because that rendering also omits other sections.
2. Consequently, I am not going to fabricate a list of examiner-cited references. Below I separate (A) the one reference I can verify from the patent's own text, (B) forward citations whose own priority dates precede 1994-12-23 and which therefore are candidate prior art (but which I cannot confirm the examiner considered), and (C) same-family/later documents that are not prior art.

To close this gap, pull the file wrapper at USPTO PatentCenter for application 08/364,479 (PatentCenter → "Documents & Transactions") to get the definitive PTO-892/1449 and examiner search notes.

3. Reference-by-reference

A. Reference cited on the face of the specification — the closest art

A1. U.S. Pat. No. 5,353,335 to D'Urso — "Multilingual prepaid telephone system"

• Issued Oct. 4, 1994 (per the '067 specification, col. 1); priority date 1992-08-02 (per Unified Patents' citation listing).
• Description (as characterized in the '067 specification and independently consistent with the family's citation record): a PSTN prepaid-card system. The user buys a quantum of service, receives a card with a unique account number and a 1-800 access number; is connected by a switching system to a host computer; the host computer prompts (VRU, multilingual) for the account number; a service management computer with a LAN-connected card database authenticates the account and credit balance; the user then enters a speed-dial alias or destination number, which is edit-checked; balance is compared to the cost of one minute to that destination; the destination is outpulsed to a network node; a call-duration timer is set; the balance is depleted during the call; near depletion the VRU is bridged on to play a warning; on exhaustion the balance is written/overwritten to the card database. If the destination goes on-hook first, the host recomputes the balance and overwrites the database record.
• Sources: '067 specification, "DESCRIPTION OF THE PRIOR ART"; corroborating citation listing at https://portal.unifiedpatents.com/patents/patent/US-[5854975](/patent/5854975)-A and https://portal.unifiedpatents.com/patents/patent/US-[6157823](/patent/6157823)-A

§ 102 mapping — D'Urso vs. the independent claims

Bottom line on D'Urso: it is the closest single reference and the only one I can verify was before the examiner, but it anticipates no claim of US 5,722,067 in full because it is a land/PSTN, card-number-and-PIN, accept-then-rate architecture, whereas every independent claim requires ANI-based, transparent, switch-triggered cellular processing with periodic decrementing. Its real value is that it (i) supplies the "prepaid account balance in a database + host computer + decrement during call + disconnect on depletion" concept, so it would anchor a § 103 obviousness position, and (ii) is the reference the applicant affirmatively distinguished, which is why the claims were drafted around the ANI/DNIS serial handshake of claim 1(f) and the switch-side ANI recognition of claim 15.

B. Forward citations with a priority date earlier than 1994-12-23 — candidate prior art (unverified as examiner-cited)

These appear only in the "Cited By" block of US 5,722,067 — i.e., they cite the '067 patent. That is not evidence the examiner cited them against the '067 application. But each has a pre-1994-12-23 priority date and is therefore legally available as prior art against the '067 claims. I have not read either specification in this session and therefore cannot opine on their disclosure with confidence — treat the § 102 remarks as preliminary screening only.

B1. U.S. Pat. No. 5,826,185 — Banana Cellular, Inc. — "Cellular phone system wherein the air time use is predetermined"

• Priority date 1994-11-16; granted 1998-10-20. This one-month-earlier cellular priority date makes it the most legally significant candidate prior art in the citation set.
• Preliminary § 102 screening: the title alone ("cellular phone system wherein the air time use is predetermined") implicates the pre-paid-airtime concept underlying claim 1(a)–(b), (h), (j) and claim 10. It is the reference I would pull first when building a § 102 challenge to claims 10, 16, 17 and 18 (balance verification + decrement-until-terminated/zero), and a § 103 base for claims 1, 2 and 15. I cannot confirm it discloses ANI-recognition at a cellular switch (claim 15) or the wink-signal DNIS/ANI serial exchange (claim 1(f)).

B2. U.S. Pat. No. 6,108,537 — Cellemetry, LLC — "Method and system for performing a predetermined operation related to a predetermined class of cellular sources"

• Priority date 1991-01-28; granted 2000-08-22 (CIP lineage).
• Preliminary § 102 screening: relevant only to the notion of a network identifying and acting on a class of cellular sources (i.e., the "reserved pre-paid cellular telephone numbers" concept of claim 15) and to cellular control-channel messaging. It does not on its face address prepaid account balances, host/server debit accounting, or LEC forwarding. I would rate it low relevance; § 103 at most, and probably only as background.

B3. Forward citations in the "Cited By" block with priority dates in 1994 (late) / 1995 and later — e.g., US 5,778,313 (Cellexis International, priority 1995-12-08), US 5,909,485 (France Télécom), US 5,915,226 (Gemplus), US 6,029,062 / 6,035,025 / 6,058,300 (National Telemanagement), WO 98/30035–30037 (MCI), US 6,101,378 (Japan Radio), US 5,806,185-adjacent filings. All are post-1994-12-23 and therefore are NOT § 102 prior art against US 5,722,067. They are useful only as evidence of the crowded state of the art at the '067 priority date (secondary § 103/objective-indicia context) and as a map of the art the '067 patent pre-empted.

C. Same-family and related documents that are NOT prior art to claim 1 et seq.

Sources: https://patents.google.com/patent/US5722067A/en (Priority Applications / Related Child Applications tables); http://www.everypatent.com/comp/pat6236851.html (priority chain of 08/559,283 ← 08/364,479)

4. Most-relevant-prior-art ranking (with confidence levels)

1. US 5,353,335 (D'Urso) — High confidence it was before the examiner (discussed at length in the '067 specification, col. 1). Closest art; anticipates none of claims 1–21; primary § 103 reference.
2. US 5,826,185 (Banana Cellular) — Low-to-moderate confidence on its substantive disclosure (title-level screening only); legally available (priority 1994-11-16). Highest-value candidate for a § 102 attack on claims 10, 16–18 and a § 103 attack on claims 1, 2, 15.
3. US 6,108,537 (Cellemetry) — Low relevance; priority 1991-01-28; background/§ 103 only.
4. Everything else in the citation graph is either post-priority (not § 102 art) or same-family (not art at all).

5. Explicit uncertainties — do not treat as verified

• The definitive PTO-892 / (56) list for 08/364,479 was not retrievable in this session. If your purpose is a validity opinion or an IDS, you must obtain the file wrapper. Do not rely on my Section 3 as an exhaustive citation list.
• I have not read the full text of US 5,826,185 or US 6,108,537; the § 102 remarks for those are screening hypotheses, not conclusions.
• No claim chart above asserts actual anticipation of any '067 claim by any reference. On the verified record, no single reference of record discloses every element of any independent claim, principally because claim 1 requires the serial first-signal/second-signal (wink) DNIS-then-ANI exchange with a cellular switch (step (f)), claim 1(d) and claim 15 require cellular-switch-side ANI recognition against stored reserved prepaid numbers, and claim 2 requires the specific switched-vs-unswitched line topology — features absent from D'Urso.
• Note the claim-construction exposure flagged in the litigation record: the '067 specification states "the cellular radiotelephone's electronic serial number (ESN) may be transmitted instead of the ANI. The ANI is referenced, herein only by way of example" (col. 7), and plaintiffs in Freedom Wireless v. Boston Communications Group sought a broad reading of "ANI" to cover MIN/ESN. A broader construction widens the prior-art field, which makes the pre-1994 cellular references (B1/B2 above) more important than their citation status suggests.

Next action I recommend: (1) USPTO PatentCenter file wrapper for 08/364,479 → PTO-892/PTO-1449; (2) full-text pull of US 5,826,185 and US 5,108,537/Cellemetry; (3) an independent search of the H04M17/00 and H04W4/24 classes for 1992–1994 cellular prepayment art not present in the '067 citation graph.

I'll ground this obviousness analysis in the actual prior-art record. Let me pull the key references cited in and around US 5,722,067.

Let me pull the remaining key references — the Klotz patent and the '067's own cited-art list.

Obviousness Analysis — US 5,722,067 under 35 U.S.C. § 103

Prepared: per the task's stated date of April 26, 2026. (Flagging a conflict: the platform header for this session shows the current date as 2026‑09‑29. I note the discrepancy rather than silently picking one.)

Relationship to prior sections: this memo builds on the previously generated claim overview and bibliographic/legal history. I do not re‑derive the claim text; I analyze it. Where the earlier sections and new evidence interact, I flag it.

Scope caveat (read first)

The fetched Google Patents page for US 5,722,067 supplies a forward‑citation table ("Cited By (154)") but does not include a "References Cited" (backward‑citation) block. So there is no authoritative list of the references the Examiner actually considered on the '067 face. I have therefore assembled the prior art from (i) references the specification itself admits (D'Urso), (ii) references the litigation record establishes were before the Examiner (Klotz, Wise, CSI), and (iii) earlier‑date art in the same field. I flag which footing each reference has.

I. Legal framework

• Pre‑AIA § 103(a) governs. The '067 was filed 1994‑12‑23, well before the AIA's effective date, so the Graham factors apply as construed in KSR Int'l Co. v. Teleflex Inc., 550 U.S. 398 (2007): (1) scope/content of prior art; (2) differences between prior art and claims; (3) level of ordinary skill; (4) objective evidence of non‑obviousness. Under KSR, a combination of known elements is obvious where it yields predictable results, where the elements are "so ordered," or where the combination is "obvious to try" with a finite number of identified, predictable solutions.
• Evidentiary posture: the '067 is an issued patent entitled to a presumption of validity, rebuttable only by clear and convincing evidence, [Microsoft Corp.](/litigations/by-plaintiff/Microsoft%20Corp.) v. i4i Ltd. P'ship, 564 U.S. 91 (2011).
• Status note: the patent expired 2015‑02‑24 ("Anticipated expiration"; "Expired – Lifetime"), so § 103 now matters only retrospectively — e.g., for back damages within the § 286 six‑year lookback, or on a declaratory‑judgment theory. This is consistent with the prior section's "no CAFC 2026 docket" finding.

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

A POSITA circa December 1994 would have: a bachelor's degree in electrical engineering, computer science, or equivalent, plus roughly 2–3 years of experience in cellular telephony and/or telecom switching and billing, or equivalent practical experience. Such a person would be conversant with: ANI/DNIS and the fact that a cellular origination inherently carries the dialed digits and the caller's MIN/ESN; MTSO/SSP call routing and "hotlining"/feature‑code routing; T1/DID "wink‑start" trunk signaling; prepaid calling‑card platforms with VRUs and host/management databases; and real‑time rating/debiting. This is a mature, well‑populated art — which materially raises obviousness risk.

III. Key constructions that drive the analysis

1. "ANI" — the specification expressly says the ESN may be transmitted instead of the ANI, "referenced herein only by way of example" ('067 col. 7). A broad, functional reading covers MIN/ESN.
2. "decrementing… at regular intervals during the telecommunications event" (claim 1(j)); "decrementing the balance… at regular intervals during the call" (claim 10) — this is the patent's self‑described point of novelty over D'Urso (real‑time periodic debiting vs. D'Urso's single pre‑computed time‑value timer). It is therefore the element that prior art must squarely meet.
3. "call" — the D. Mass. and E.D. Tex. courts both treated "call" as including voice data, not signaling alone (E.D. Tex., 2:06‑cv‑00504 construction).
4. "unswitched lines" (claim 2) — dedicated (e.g., T1) facilities between the cellular switch and the prepaid provider.

IV. Prior art references

Klotz date caveat (do not auto‑correct): the US patent issued 1997‑01‑07, but if its US filing is a 1996 continuation of a 1993 German application, then under In re Hilmer the foreign priority does not move back its § 102(e) date — which would put it after the '067's 1994‑12‑23 filing. Its force as prior art then rests on the German counterpart publication (DE 43 12 362 A1; also DE 42 43 851 A1 appears in the same period — https://patents.google.com/patent/DE4312362A1). The D. Mass. court recorded Klotz was before the Examiner during the '067 and '823 prosecutions and reviewed. I flag this because obviousness timing turns on the correct priority/publication date, and I could not fully verify the German publication date within this search budget.

V. Claim‑by‑claim obviousness

Claim 1 (independent method)

Combination proposed: D'Urso + Klotz + Wise + CSI, with ordinary T1/DID signaling know‑how.

• (a)–(b) balance linked to a number, written to a database → D'Urso (management‑server DB), Klotz (debit account), Wise (per‑phone account).
• (c) subscriber dials destination → phone transmits DNIS + ANI → this is simply standard cellular origination (dialed digits + MIN/ESN are delivered with every origination), a fact the patent itself exploits and the spec concedes ("ESN may be transmitted instead of the ANI").
• (d) switch recognizes ANI as prepaid → CSI ("identifies this call as… pre‑paid… and routes it directly"), Wise (MTSO recognizes the serial number and routes to PATTI via hotlining).
• (e) switch goes off‑hook to host computer → Wise (MTSO seizes a line and calls the pre‑programmed DID number to PATTI); D'Urso (switch connects user to host).
• (f) host serially winks to pull DNIS, then ANI → conventional wink‑start/DID trunk signaling on T1; a POSITA implementing a switch↔host interface would use exactly this handshake. This is the '067's weakest‑supported element and its best validity hook.
• (g) host ↔ remote server database, validate ANI → D'Urso (host ↔ management server via LAN); the '067's own dependent claims 4–5 recite LAN/WAN as mere options.
• (h) validate balance on DNIS + time of day → D'Urso (destination rate lookup; peak/off‑peak is routine); Klotz (Dmin1 minimum‑credit test); Wise (airtime availability).
• (i) host ↔ LEC, outpulse DNIS only on affirmative validation → CSI (third‑party switch connects to the LEC), Wise's PATTI (seizes outside line), D'Urso (outpulses destination).
• (j) on destination off‑hook, decrement at regular intervals until on‑hook → Klotz (SCP "consecutively deduct[s] a predetermined unit fee," SSP releases at zero) and/or Wise (PATTI "deducts minutes throughout the call"). This is the patent's own stated point of distinction from D'Urso — and it is met head‑on by Klotz/Wise.
• (k) disconnect on failed validation or on‑hook → D'Urso, Klotz, Wise.

Conclusion on claim 1: a strong prima facie case of obviousness as a predictable combination of known prepaid‑platform and cellular‑routing elements. The only element not squarely in a single reference is the wink handshake, which is ordinary trunk‑signaling design choice.

Claim 2 (system)

CSI + D'Urso + Klotz/Wise. CSI expressly contemplated a third‑party switch interconnected with MTSOs and the PSTN; D'Urso supplies the host + remote management‑server database architecture; Wise supplies the external prepaid platform receiving calls forwarded from the MTSO. Coupling the host to the LEC over switched lines and to the cellular switch over unswitched (T1) lines is a routine facility‑selection choice driven by the same architecture. Strong obviousness case.

Claim 10 (streamlined method)

Klotz alone gets most of the way (verify positive/minimum balance; complete the call; deduct at intervals; release at zero), and Wise supplies the external‑platform/ANI variant. Adapted to a cellular carrier with ANI identification, claim 10 is highly vulnerable. Highest obviousness risk of the four independent claims after claim 15.

Claim 15 (switch‑side method) — highest risk

"Receive ANI → check against stored reserved prepaid numbers → forward the call directly to a prepaid service provider." This is precisely the concept the litigation identified as the prior‑art‑disclosed "first basic idea." Per the D. Mass. findings:

"Professor Wicker tested that if the Examiner had the Wise 5,826,185 patent, the Klotz 5,592,535 patent, and the CSI proposal before him, he would have all three purported main ideas in the Freedom patents plus periodic validation." — https://courtlistener.com/opinion/2580067/

and the court treated claim 15 specifically as the claim to which the CSI/Wise/Klepp art was material. That is strong, record‑based evidence that claim 15 would have been obvious over CSI (identify‑and‑route at the switch) in view of Wise/Klotz (balance validation and periodic debiting). The E.D. Tex. construction that "call" includes voice data is the principal narrowing hook a patentee could press (arguing the references show only signaling forwarding), but CSI's proposal is expressly about completing calls through a third‑party switch to the LEC, which undercuts that argument.

Dependent claims 3–9, 11–14, 16–21

Routine and largely anticipated by the platform‑architecture art:

• 3 (land lines) — T1 is the disclosed and conventional medium (CSI; Wise).
• 4–5 (LAN/WAN) — conventional client/server; D'Urso already uses a LAN to its management server.
• 6 (RAID) — generic hardware; no inventive weight.
• 7–8 (host memory storing/revising account info during call; write‑back to server) — Klotz (SCP debits during call) and Wise (PATTI debits during call); D'Urso discloses post‑call DB overwrite (write‑back goes further, but is a predictable improvement).
• 9, 14, 18 (terminate at/below zero) — Klotz ("release[] if the debit account shows no credit balance"), Wise.
• 11–13, 19–21 (find ANI; retrieve balance; remote/shared database) — D'Urso (LAN to a shared management server) plus conventional multi‑tenant server design. Claim 13/21's "sharing access to the database with other pre‑paid switching systems" is the natural scaling of D'Urso's centralized management server.

VI. Motivation to combine (the § 103 linchpin)

A POSITA in late 1994 had several articulated reasons to combine these teachings — not mere hindsight:

1. Common field, common problem. All references address prepaid telephony's twin problems — credit risk and fraud/cloning — the same problems the '067 recites in its Background.
2. KSR "predictable solutions." Prepaid wireless was the known next step from prepaid wireline (D'Urso). Klotz had already made cellular prepaid transparent and debit‑based; Wise had already combined MTSO identification + an external prepaid platform + real‑time unit deduction. Combining them is the paradigm "combination of familiar elements according to known methods… yield[ing] predictable results."
3. Explicit architectural motivation in the art. The CSI proposal and the (non‑prior‑art) Cominex materials show that workers in the field were already thinking in terms of "identify the prepaid call at the switch and route it to a third‑party platform," which is the '067's stated advance. The commercial motive — an interposed prepaid provider between the carrier and the LEC (see BCGI's appellate brief: Cellexis's business plan) — is documented.
4. Design incentives to keep the carrier switch simple. Hotlining/feature‑code routing (Wise) lets the carrier avoid modifying its switch, which the art expressly frames as an advantage.
5. Admissions of record. BCGI's appellate brief reports that Freedom's own expert "admitted that the fundamental features of Freedom's claims — identifying a call as prepaid at the switch and routing it to a service provider — would have been obvious to even persons of less than ordinary skill in the art" (https://www.appellate.net/briefs/FreedomWirelessvBCGI_AppellantsBrief.pdf). This is a party's characterization in a brief, not a holding, but it is admissible‑grade evidence of the objective state of the art.

VII. Countervailing / non‑obviousness evidence

• The 2005 jury found the asserted claims valid (not proven invalid by clear and convincing evidence) and the court rejected inequitable conduct, 390 F. Supp. 2d 63 (D. Mass. 2005). This is meaningful — but it is not an obviousness holding on this combination, and the case settled in July 2006 before any Federal Circuit validity ruling, so no appellate law‑of‑the‑case forecloses a re‑litigation.
• Commercial success / $128M verdict suggests real‑world value, but with weak nexus: the accused BCGI service differed materially from the claims (it returned the call to the carrier rather than forwarding to the LEC — see BCGI brief), which undermines nexus between the claimed invention and the success.
• Long‑felt need / failure of others: Cellexis's three licensees went bankrupt or never entered the market, which the patentee could argue shows the invention was not obvious to try. Counterpoint: that evidence is about commercial acceptance of the business model, not technical difficulty.
• Possible teaching away: BCGI argued carriers "could not tolerate" ceding call control to a third party. That is a strong commercial‑reluctance argument but a weak legal teaching‑away, because it does not disparage or foreclose the claimed architecture; it merely reflects carrier preference.

VIII. Honest weaknesses in the § 103 case

1. Element 1(f) — no single reference of record discloses the serial wink/WINK‑pull of DNIS then ANI at the host. It is conventional signaling, but a patentee will argue KSR does not excuse a missing limitation.
2. Claim 1's sequence as a whole is not disclosed in any one reference; the case is a four‑reference combination, which invites "hindsight" attack even where each reference is analogous art.
3. Klotz's prior‑art date is contestable (US filing vs. German priority; Hilmer), and I could not fully verify the German publication date. If Klotz's effective date is 1996, the periodic‑debiting element must be carried by Wise (whose 1994‑11‑15/16 priority predates the '067 filing but whose US § 102(e) date and public‑use date require care) and by D'Urso's during‑call depletion.
4. Cominex is out — the court found it was not publicly available, so any obviousness theory leaning on "identify at switch → route to Cominex" must stand on CSI + Wise, not the brochure.
5. "Call" = voice data (E.D. Tex.) narrows claim 15 and gives the patentee room to argue the references show signaling only.
6. I could not retrieve US 5,359,642 (Castro) in this session; its disclosure (the Examiner's initial rejection vehicle) is unverified here.

IX. Bottom line

The combination with the best chance of clear‑and‑convincing proof is CSI + Wise + Klotz (optionally + D'Urso) against claims 10 and 15; claim 1 is the most defensible because of the serial wink limitation.

X. Contradictions and confidence flags

1. Date conflict: platform header (2026‑09‑29) vs. task statement (April 26, 2026). Not resolved; noted.
2. Klotz citation string: the litigation record renders it as both "5,592,535" and "5,592,585." Per the strict rule, I did not auto‑correct; I treat US 5,592,535 (Alcatel SEL, "Mobile‑radio network with debit accounts") as the reference and flag the "…585" variant as a record inconsistency.
3. Wise priority date: sources show 1994‑11‑15 (Unified Patents) and 1994‑11‑16 (Google Patents). Both literal values are reported above.
4. "Prior Art section" of the requested page: the fetched page contained a "Cited By" table but no "References Cited" block; I disclosed this gap rather than inventing an examiner‑cited list.
5. Consistency with prior sections: this memo agrees with the earlier "Expired – Lifetime / 2015‑02‑24" finding and the "no CAFC 2026 docket" conclusion. No contradiction found on those points.
6. Confidence: moderate on references I could retrieve directly (D'Urso, Wise/'185, Klotz/'535 via uspto.report, CSI via the D. Mass. opinion); low on the German publication dates underpinning Klotz's prior‑art status and on the un‑retrieved Castro '642 reference.