Patent Armory v. Citibank: Five Call Routing Patents, Dismissed With Prejudice in 55 Days
Patent Armory, Inc. filed suit against Citibank, NA in the Eastern District of Texas asserting five patents spanning intelligent call routing, telephony control, and entity-matching auction systems. The case was voluntarily dismissed with prejudice under Rule 41(a)(1)(A)(i) just 55 days after filing — before any substantive court ruling.
A Patent Assertion Ends Before It Begins: Five Patents, No Defense Filed
On December 18, 2024, Patent Armory, Inc. filed an infringement action against Citibank, NA in the U.S. District Court for the Eastern District of Texas (Case No. 2:24-cv-01060), before Judge Rodney Gilstrap. The complaint asserted five U.S. patents — US9456086B1, US10491748B1, US7269253B1, US7023979B1, and US10237420B1 — covering intelligent communication routing, telephony control systems, and method-and-system auction-matching technologies. The accused products include Citibank’s intelligent communication routing systems and telephony control infrastructure.
The case concluded on February 11, 2025, when Plaintiff filed a Notice of Voluntary Dismissal With Prejudice pursuant to Rule 41(a)(1)(A)(i). Judge Gilstrap accepted and acknowledged the dismissal, ordering that each party bear its own costs, expenses, and attorneys’ fees. A dismissal with prejudice permanently bars Patent Armory from re-filing the same claims against Citibank on these five patents, representing a terminal outcome for the plaintiff’s enforcement effort against this defendant.
The 55-day lifespan and dismissal prior to any substantive defence filing is consistent with a pre-litigation settlement, licensing agreement, or a plaintiff decision to withdraw following informal communications. No defendant agents or law firm appear on the public docket, suggesting Citibank may not have formally appeared before the dismissal was filed. The underlying terms of any resolution — and whether any licence or payment was exchanged — are not disclosed in the public record.
Filing to Voluntary dismissal in 55 days
55 days — well below the typical E.D. Tex. patent case lifespan of 2–3 years
Dismissed with prejudice: what the Rule 41 exit means for both parties
Rule 41(a)(1)(A)(i): Plaintiff’s unilateral exit before defendant appears
Rule 41(a)(1)(A)(i) permits a plaintiff to voluntarily dismiss an action without a court order before the opposing party serves an answer or motion for summary judgment. Here, dismissal was filed with prejudice — a plaintiff election that is more restrictive than the default rule requires. The court accepted and acknowledged the dismissal, which carries the same preclusive effect as an adjudication on the merits.
Rule 41(a)(1)(A)(i)With prejudice: Patent Armory is permanently barred from re-asserting these claims
A voluntary dismissal with prejudice is a final disposition on the merits for preclusion purposes. Patent Armory cannot refile these same infringement claims against Citibank on US9456086B1, US10491748B1, US7269253B1, US7023979B1, or US10237420B1. This is a stronger concession than the no-prejudice default under Rule 41 would require, and may reflect a negotiated exit condition or settlement term not visible in the public record.
Res judicata effect appliesCitibank walks away with no injunction, no damages, and no costs order against it
With each party bearing its own costs and the action dismissed before any substantive ruling, Citibank avoids any adverse finding on infringement or validity. No attorney fee award was made against either party. Citibank’s position on these five patents is now protected by the preclusive effect of the with-prejudice dismissal — though the patents themselves remain in force and could be asserted against other defendants.
No adverse finding for CitibankPatents survive; other financial sector defendants remain exposed
The dismissal with prejudice only bars Patent Armory’s claims against Citibank. All five patents — covering intelligent routing, telephony control, and auction-matching — remain enforceable against third parties. Other banks or financial technology companies operating similar call-routing or customer-matching infrastructure should note that these patents are still active assets in Patent Armory’s portfolio and could form the basis of future assertions.
Five patents remain enforceableFull party and counsel information
| Role | Name | Type | Detail |
|---|---|---|---|
| Plaintiff | Patent Armory, Inc. | Company | Patent assertion entity — holder of 5 call routing and telephony control patentsSearch in Eureka ↗ |
| Defendant | Citibank, NA | Individual | Citibank, NA — major U.S. financial institution and operator of large-scale telephony infrastructureSearch in Eureka ↗ |
| Plaintiff counsel | Isaac Phillip Rabicoff | Attorney | Counsel for Patent Armory, Inc.Search in Eureka ↗ |
| Plaintiff law firm | Rabicoff Law LLC | Law Firm | Representing Patent Armory, Inc.Search in Eureka ↗ |
| Presiding judge | Judge Rodney Gilstrap | Judge | Texas Eastern District CourtSearch in Eureka ↗ |
Official order — verbatim text
The verdict text confirms a plaintiff-initiated dismissal with prejudice under Rule 41(a)(1)(A)(i), filed before any defendant appearance. The court’s language — ‘ACCEPTS AND ACKNOWLEDGES’ — reflects ministerial acceptance rather than adjudication. The with-prejudice designation and mutual costs-bearing order are the operative terms: Patent Armory forfeits all claims against Citibank permanently, while neither party recovers litigation costs. All pending relief is denied as moot, leaving no live issues between these parties.
Five Call Routing & Auction-Matching Patents at the Centre of This Dispute
The five asserted patents — US9456086B1, US10491748B1, US7269253B1, US7023979B1, and US10237420B1 — collectively cover a range of telecommunications and matching-system technologies. Application dates span from the early 2000s (US10/385389, US11/387305) through 2017 (US15/856729), reflecting both legacy telephony infrastructure patents and more recent digital routing innovations. The technical domain centres on how communications are intelligently routed, how telephony systems exercise control over call handling, and how systems match entities within auction-style frameworks.
For financial institutions, these patents are strategically significant because large-scale customer service operations — including IVR systems, call-queue management, and digital channel routing — sit squarely within the claimed subject matter. Patent Armory’s portfolio spans multiple continuation generations, which suggests the claims have been iteratively refined to track deployed technology. Any financial services firm operating a sophisticated inbound or outbound telephony or digital routing platform should treat this portfolio as an active enforcement risk, particularly given that the dismissal only extinguishes claims against Citibank.
Should your team run an FTO against Patent Armory’s call routing portfolio?
If your organisation operates intelligent call routing, IVR, telephony control, or digital-channel entity-matching systems in financial services or adjacent sectors, all five patents in this portfolio remain enforceable. Patent Armory has demonstrated willingness to assert these patents in active litigation. The Citibank dismissal with prejudice provides no safe harbour for third parties — it is defendant-specific. Product and engineering teams deploying or upgrading routing infrastructure should treat a formal FTO analysis as a near-term priority.
PatSnap Eureka’s FTO Search Agent can map each of the five patent numbers — US9456086B1, US10491748B1, US7269253B1, US7023979B1, and US10237420B1 — against your product architecture to identify claim overlap, locate prior art that may support invalidity arguments, and surface related continuations or divisionals in Patent Armory’s broader portfolio. Eureka also tracks prosecution history to assess claim scope, giving R&D and legal teams the context needed to make informed design-around or licensing decisions.
Run a freedom-to-operate analysis on US9456086B1 to assess your product’s exposure
Run FTO in Eureka →Similar Patent Cases: Call Routing & Telephony IP Litigation in E.D. Tex.
Cases involving intelligent call routing, telephony control patents, and PAE assertions against financial sector defendants in the Eastern District of Texas — curated by PatSnap.
What this case signals for the financial services call routing IP landscape
A 55-day lifecycle and with-prejudice exit in E.D. Tex. carries distinct signals for patent risk teams in financial services.
With-prejudice exits protect defendants — but only the named party
Patent Armory’s dismissal with prejudice shields Citibank from re-assertion of these five patents. However, the same patents remain live enforcement tools against every other financial institution operating intelligent call routing or telephony control systems. This case should prompt peer banks and fintechs to audit exposure independently.
E.D. Tex. remains a high-velocity venue for patent assertion against financial defendants
Judge Gilstrap’s docket in the Eastern District of Texas continues to attract patent assertion entities targeting financial services infrastructure. The 55-day resolution here is unusually fast — consistent with early-stage negotiated exit — and underscores that even rapid resolutions carry permanent legal consequences through preclusion.
Patent v Citibank — key questions answered
A dismissal with prejudice in this case means Patent Armory permanently forfeits the right to re-assert infringement claims against Citibank based on the five patents at issue. It carries the preclusive effect of a final judgment on the merits under res judicata principles. Citibank cannot be sued again by Patent Armory on US9456086B1, US10491748B1, US7269253B1, US7023979B1, or US10237420B1.
Patent Armory asserted five patents: US9456086B1 and US10491748B1 (intelligent communication routing), US7269253B1 and US7023979B1 (telephony control systems with intelligent call routing), and US10237420B1 (method and system for matching entities in an auction). Application dates range from the early 2000s to 2017, spanning legacy and more recent routing technologies.
The 55-day resolution is consistent with pre-answer settlement, licensing negotiation, or a plaintiff decision to withdraw following informal communications. No defendant counsel appeared on the public docket, suggesting Citibank had not formally responded before the dismissal was filed. The public record does not disclose whether any licence or payment was exchanged as part of the resolution.
No. A voluntary dismissal with prejudice only bars Patent Armory from re-asserting these five patents against Citibank specifically. All five patents remain enforceable against other defendants. Financial institutions and fintech companies operating intelligent call routing, IVR, or digital-channel matching systems should conduct independent FTO analysis — the Citibank outcome provides no third-party safe harbour.
Rule 41(a)(1)(A)(i) of the Federal Rules of Civil Procedure permits a plaintiff to voluntarily dismiss an action without a court order, provided the defendant has not yet served an answer or a motion for summary judgment. Patent Armory used this provision to unilaterally file its Notice of Voluntary Dismissal. The plaintiff elected to make the dismissal with prejudice — a stricter outcome than the rule’s default, which would be without prejudice — permanently barring re-assertion against Citibank.
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