Patent Armory v. Taco Cabana: Five Call Routing Patents, Dismissed in 72 Days
Patent Armory, Inc. filed suit in the Western District of Texas asserting five patents covering intelligent call routing, telephony control, and auction-based entity matching against Texas Taco Cabana, L.P. The case ended in a voluntary dismissal with prejudice just 72 days after filing — before Taco Cabana filed any answer — with each party bearing its own costs.
Five-Patent Call Routing Suit Against Taco Cabana Ends Abruptly
On April 10, 2024, Patent Armory, Inc. filed suit against Texas Taco Cabana, L.P. in the Western District of Texas (Case No. 6:24-cv-00184), asserting five U.S. patents: US9456086B1, US10491748B1, US7269253B1, US7023979B1, and US10237420B1. The asserted patents collectively cover intelligent communication routing, telephony control with intelligent call routing, and auction-based entity matching — technologies often deployed in customer service and call centre infrastructure. The products at issue included intelligent communication routing systems and telephony control systems.
The case closed on June 21, 2024, just 72 days after filing, via a plaintiff-initiated voluntary dismissal with prejudice under Federal Rule of Civil Procedure 41(a)(1)(A)(i). Critically, Taco Cabana had not yet filed an answer or moved for summary judgment at the time of dismissal. A dismissal with prejudice under this rule extinguishes the plaintiff’s right to reassert the same claims against the same defendant — a significant concession by Patent Armory. Each party was ordered to bear its own costs, fees, and expenses.
The 72-day timeline suggests the parties reached an understanding — or Patent Armory reconsidered its position — before substantive litigation commenced. The public record does not disclose whether a confidential settlement was reached; the cost-bearing clause (‘each party shall bear its own costs’) is consistent with either a walk-away or an undisclosed side agreement. What remains unknown is whether Patent Armory received any licence consideration outside the court record. The speed of resolution, combined with the pre-answer timing, is consistent with NPE enforcement patterns where early pressure is applied ahead of costly defence.
Filing to Voluntary dismissal in 72 days
72 days — well below the W.D. Tex. median for patent cases, suggesting early resolution
Dismissed with prejudice: what Rule 41 means for both parties
Rule 41(a)(1)(A)(i): plaintiff’s right to dismiss, once
Under FRCP 41(a)(1)(A)(i), a plaintiff may voluntarily dismiss an action without a court order before the defendant has answered or moved for summary judgment. Dismissal with prejudice — as expressly stated here — is a final adjudication on the merits for preclusion purposes. Patent Armory cannot bring these five patents against Taco Cabana again in any U.S. federal court.
Permanent bar on re-filingWith prejudice means no second bite at Taco Cabana
A dismissal ‘with prejudice’ operates as a final judgment on the merits under res judicata doctrine. Patent Armory’s election to dismiss with prejudice — rather than without prejudice — is notable: it permanently forecloses reassertion of these five patents against this defendant. The public record does not reveal whether a confidential licence or payment accompanied the dismissal; practitioners should not assume the absence of consideration.
Res judicata appliesTaco Cabana exits without an answer filed or costs incurred
Taco Cabana achieved a full exit from litigation before incurring the cost of filing an answer, conducting discovery, or briefing any substantive motion. The ‘each party bears own costs’ clause confirms no fee recovery was sought or granted. For a restaurant operator defending a multi-patent NPE suit, this is a commercially efficient outcome — though the underlying infringement question was never adjudicated on the merits.
No merits rulingNPE call routing patents remain active enforcement risks
The five asserted patents remain valid and enforceable — the dismissal resolves only this defendant’s exposure. Other businesses deploying intelligent call routing, IVR, or auction-based call matching infrastructure remain potential targets. The pre-answer exit is consistent with NPE litigation economics: the goal is often early settlement before defence costs accumulate, not a merits victory. Companies in hospitality, retail, and food service with similar telephony stacks should assess their exposure.
Patents remain enforceableFull party and counsel information
| Role | Name | Type | Detail |
|---|---|---|---|
| Plaintiff | Patent Armory, Inc. | Company | Non-practising entity (NPE) — holder of US9456086B1 and 4 further call routing patentsSearch in Eureka ↗ |
| Defendant | Texas Taco Cabana, L.P. | Individual | Texas Taco Cabana, L.P. — quick-service restaurant chain operating customer-facing telephony systemsSearch in Eureka ↗ |
| Plaintiff counsel | Isaac 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 ↗ |
| Defendant counsel | Jason E. Mueller | Attorney | Counsel for Texas Taco Cabana, L.P.Search in Eureka ↗ |
| Defendant counsel | Lauren A. Kickel | Attorney | Counsel for Texas Taco Cabana, L.P.Search in Eureka ↗ |
| Defendant law firm | Vorys, Sater, Seymour & Pease LLP | Law Firm | Representing Texas Taco Cabana, L.P.Search in Eureka ↗ |
| Presiding judge | Judge N/A | Judge | Texas Western District CourtSearch in Eureka ↗ |
Official order — verbatim text
The dismissal notice invokes FRCP 41(a)(1)(A)(i) and expressly states ‘with prejudice’ — language that transforms what could have been a procedural exit into a permanent bar. The pre-answer timing is legally significant: it confirms Taco Cabana’s procedural posture gave Patent Armory unilateral dismissal rights. The symmetric cost clause suggests neither side sought to characterise this as a win. The infringement question under any of the five patents was never reached.
US9456086B1 — Intelligent Communication Routing System and Method
US9456086B1 (App. No. 12/719827) anchors the asserted portfolio and covers intelligent communication routing systems — technology that manages inbound call distribution, routing logic, and real-time telephony decision-making. Companion patents US7269253B1 and US7023979B1 (filed 2003–2004) cover telephony control with intelligent call routing, suggesting foundational claim priority. US10491748B1 and US10237420B1 (filed 2015–2017) extend into auction-based entity matching, reflecting evolution of the technology toward algorithmic call-matching architectures.
For the restaurant and hospitality sector, intelligent call routing is embedded in order management, customer service lines, and reservation systems. The breadth of the five-patent portfolio — spanning foundational telephony control to auction-based matching — means that even modern cloud-based IVR implementations may fall within claim scope depending on architecture. Patent Armory’s decision to assert this portfolio against a quick-service restaurant chain suggests it views customer-facing telephony infrastructure as commercially viable assertion territory regardless of industry vertical.
Should you run an FTO against US9456086B1 and the Patent Armory call routing portfolio?
Any business operating intelligent call routing, IVR systems, or automated call-matching infrastructure — particularly in hospitality, food service, retail, or customer service — should consider an FTO assessment against Patent Armory’s five-patent portfolio. This is especially true if your telephony stack includes auction-based or algorithmic routing logic, real-time call distribution engines, or third-party call management platforms that may implement the claimed methods.
PatSnap Eureka’s FTO Search Agent can map your product architecture against the claim sets of all five asserted patents simultaneously, identifying overlapping claim language and prior art that may support design-around or invalidity arguments. Eureka’s citation analysis also surfaces the patent family relationships and continuation risk — critical context given the portfolio spans application dates from 2003 to 2017.
Run a freedom-to-operate analysis on US9456086B1 to assess your product’s exposure
Run FTO in Eureka →Similar Call Routing & Telephony Patent Cases in W.D. Texas
Cases involving intelligent call routing and telephony system patents filed in the Western District of Texas by non-practising entities, including pre-answer dismissals and NPE enforcement patterns.
What this case signals for the call routing and telephony IP landscape
A 72-day NPE suit ending pre-answer is a pattern, not an anomaly — and the five patents are still live.
Pre-answer dismissals don’t mean the patents are weak
Patent Armory’s voluntary dismissal with prejudice against Taco Cabana says nothing about the validity or strength of the five asserted patents. The patents remain fully enforceable. Any business operating intelligent call routing, telephony IVR, or entity-matching communication infrastructure should treat this as an active landscape risk, not a resolved one.
W.D. Texas remains a preferred venue for NPE telephony patent suits
The Western District of Texas continues to attract NPE filings in communication technology. Even short-lived cases like this one contribute to a plaintiff-friendly filing pattern. Defendants in the hospitality and food service sectors — frequently targets of call routing assertions — should maintain current FTO analyses and monitor Patent Armory’s broader portfolio activity.
Patent v Texas — key questions answered
Patent Armory, Inc. filed suit against Texas Taco Cabana, L.P. in the Western District of Texas on April 10, 2024, asserting five patents covering intelligent call routing and telephony systems. The case was voluntarily dismissed with prejudice by the plaintiff on June 21, 2024 — 72 days after filing — before Taco Cabana filed any answer. Each party bore its own costs.
A dismissal with prejudice under FRCP 41(a)(1)(A)(i) operates as a final adjudication on the merits for res judicata purposes. Patent Armory cannot reassert the same five patents against Texas Taco Cabana in any future U.S. federal court proceeding. The patents themselves remain valid and enforceable against other defendants.
Yes. The dismissal with prejudice resolves only the claims against Texas Taco Cabana. US9456086B1, US10491748B1, US7269253B1, US7023979B1, and US10237420B1 remain valid and enforceable. No court ruled on infringement or validity. Other companies operating intelligent call routing or telephony infrastructure remain potential enforcement targets.
The public record does not disclose the reason. Pre-answer dismissals in NPE cases are consistent with several scenarios: a confidential licence agreement, a strategic decision to pursue more valuable targets, or a reassessment of claim applicability. The symmetric cost-bearing clause does not preclude a confidential payment. Practitioners should not infer patent weakness from the dismissal timing alone.
The accused products included an intelligent communication routing system and method, a method and system for matching entities in an auction, and a telephony control system with intelligent call routing. These descriptions suggest the suit targeted call routing and customer communication management infrastructure used in Taco Cabana’s restaurant operations.
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