Patent Armory v. United Rentals: 5-Patent Call Routing Suit Voluntarily Dismissed
Patent Armory, Inc. filed suit against United Rentals, Inc. in the Western District of Texas asserting five patents covering intelligent call routing, telephony control, and auction-based entity matching. The case was voluntarily dismissed without prejudice after 556 days — before United Rentals filed an answer or any dispositive motion.
Five call routing patents, one pre-answer dismissal in Waco
Patent Armory, Inc. filed this infringement action on 13 August 2023 in the Western District of Texas before Judge Alan D. Albright, asserting five U.S. patents: US9456086B1, US10491748B1, US7269253B1, US7023979B1, and US10237420B1. The asserted patents span intelligent communication routing systems, telephony control with intelligent call routing, and method and system claims for matching entities in an auction context. The defendant, United Rentals, Inc., is one of the largest equipment rental companies in North America.
The case closed on 19 February 2025 via a voluntary dismissal without prejudice filed by Patent Armory under Federal Rule of Civil Procedure 41(a)(1)(A)(i). That procedural rule permits a plaintiff to dismiss unilaterally — without a court order — provided the defendant has not yet served an answer or moved for summary judgment. The public record confirms United Rentals had not reached either threshold, meaning the dismissal required no judicial approval and imposed no merits adjudication on either party.
At 556 days, the case ran for roughly eighteen months before resolution — a notable duration for a pre-answer dismissal, which typically signals extended pre-litigation negotiation, licensing discussions, or plaintiff-side strategic reassessment rather than substantive motion practice. The absence of defendant counsel on record and the lack of any cost ruling leave the commercial terms, if any, entirely undisclosed. Whether Patent Armory intends to refile against United Rentals or pursue the same patent portfolio against other defendants in the equipment rental or telephony-adjacent sectors remains an open question.
Filing to Voluntary dismissal in 556 days
556 days in W.D. Texas — closed before defendant filed an answer
Voluntarily dismissed: what the Rule 41 exit means for both parties
Rule 41(a)(1)(A)(i): plaintiff’s unilateral exit right
Federal Rule of Civil Procedure 41(a)(1)(A)(i) allows a plaintiff to dismiss an action without a court order — and without prejudice — as of right, provided the defendant has not yet answered or moved for summary judgment. United Rentals had not reached either threshold. The dismissal is self-executing: no judicial approval was required, and no merits determination was made on any of the five asserted patents.
No merits rulingWithout prejudice — but the public record is silent on terms
The dismissal notice specifies ‘without prejudice,’ meaning Patent Armory retains the legal right to refile the same claims against United Rentals in the future, subject to applicable statutes of limitations. A voluntary dismissal without prejudice does not preclude a settlement having occurred privately — the two are not mutually exclusive. However, the public record contains no settlement agreement, no licensing disclosure, and no cost award. The distinction matters: a ‘with prejudice’ dismissal would permanently bar refiling; this one does not.
Refiling remains possiblePatent Armory retains all enforcement options
Because the dismissal is without prejudice and no court has ruled on validity, claim scope, or infringement, Patent Armory’s five asserted patents emerge from this litigation legally intact. The entity can refile against United Rentals, initiate parallel actions against other defendants in adjacent sectors, or pursue licensing negotiations against any party operating intelligent call routing or telephony control systems. The portfolio’s enforceability is unchanged by this outcome.
Portfolio legally intactUnited Rentals exits without admission — but exposure persists
United Rentals avoids any infringement finding and incurs no recorded cost liability. However, the without-prejudice nature of the dismissal means the litigation risk has not been extinguished. If Patent Armory refiles — or if the portfolio is transferred to another NPE — United Rentals could face renewed exposure. Companies in equipment rental and related service sectors that rely on telephony routing, CRM call distribution, or auction-based matching platforms should treat this outcome as deferred rather than resolved.
Exposure deferred, not eliminatedFull party and counsel information
| Role | Name | Type | Detail |
|---|---|---|---|
| Plaintiff | Patent Armory, Inc. | Company | Patent licensing entity — holder of US9456086B1 and four related call routing patentsSearch in Eureka ↗ |
| Defendant | United Rentals, Inc. | Company | United Rentals, Inc. — largest equipment rental company in North AmericaSearch 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 ↗ |
| Presiding judge | Judge Alan D Albright | Judge | Texas Western District CourtSearch in Eureka ↗ |
Official order — verbatim text
The dismissal notice invokes Rule 41(a)(1)(A)(i) precisely and confirms the procedural prerequisite — that United Rentals had not answered or moved for summary judgment. This phrasing is significant: it confirms the dismissal is self-executing and carries no judicial finding on infringement, validity, or claim scope. The without-prejudice designation preserves Patent Armory’s full enforcement rights across all five patents. For United Rentals, the absence of any merits ruling means the company cannot assert res judicata or claim preclusion if the patents are reasserted.
US9456086B1 — Intelligent communication routing system and method
US9456086B1 (application no. US12/719827) is the lead asserted patent, covering an intelligent communication routing system and method. The portfolio also includes US10491748B1 (auction-based entity matching), US7269253B1 and US7023979B1 (telephony control systems with intelligent call routing), and US10237420B1 (communication routing). The application dates span from the early 2000s to 2017, indicating a mature, multi-generational portfolio designed to cover successive implementations of routing and telephony control technology as the market evolved.
The strategic value of this portfolio lies in its breadth across both legacy telephony infrastructure and modern cloud-based call routing architectures. Claims covering ‘intelligent’ routing logic and auction-based matching are technology-agnostic enough to reach SaaS contact centre platforms, CRM-integrated diallers, and lead distribution systems. For the equipment rental sector specifically — where inbound call routing and lead-matching underpin customer acquisition — the portfolio represents a non-trivial enforcement surface. Patent licensing entities holding similar stacks have historically pursued broad defendant pools across verticals reliant on third-party telephony middleware.
Should you run an FTO against US9456086B1 and the Patent Armory portfolio?
Any organisation operating intelligent call routing, IVR systems, auction-based lead matching, or telephony control middleware should evaluate freedom-to-operate against this five-patent portfolio. The risk is not limited to equipment rental: the method claims in US10491748B1 and the system claims in US9456086B1 are sufficiently broad to reach contact centre platforms, marketplace lead-routing engines, and CRM-integrated communication systems across sectors. The without-prejudice dismissal against United Rentals means the portfolio remains fully active and enforceable.
PatSnap Eureka’s FTO Search Agent allows R&D and legal teams to map their specific call routing implementations against each of the five asserted patents simultaneously. Eureka can surface claim-level overlap analysis, identify prior art that could support invalidity arguments, and flag prosecution history estoppel that may narrow enforceability. For in-house teams assessing whether their telephony stack is exposed, a structured Eureka FTO run against the full Patent Armory portfolio provides the documentary foundation needed for a credible non-infringement or design-around analysis.
Run a freedom-to-operate analysis on US9456086B1 to assess your product’s exposure
Run FTO in Eureka →Similar call routing and telephony patent cases in W.D. Texas
Explore NPE-filed patent infringement cases asserting intelligent call routing and telephony control patents in the Western District of Texas before Judge Albright.
What this case signals for the telephony IP and NPE enforcement landscape
A pre-answer voluntary dismissal from a patent licensing entity in W.D. Texas rarely means the matter is over — it typically signals a pivot.
Pre-answer NPE dismissals in W.D. Texas often precede portfolio recycling
When a patent licensing entity files in Judge Albright’s court and exits before the defendant answers, the most common drivers are licensing resolution, portfolio reassignment, or tactical repositioning. None of these outcomes extinguish the underlying patent rights. Companies receiving demand letters based on call routing or telephony control patents should treat this case as a live precedent for re-engagement risk.
Five-patent stacks covering call routing deserve coordinated FTO analysis
The asserted portfolio spans application filing dates from the early 2000s through 2017, covering both method and system claims in telephony routing and auction-based entity matching. Any enterprise operating contact centre infrastructure, intelligent IVR, or call distribution software should conduct coordinated freedom-to-operate analysis across the full five-patent stack rather than treating each patent in isolation.
Patent v United — key questions answered
Patent Armory filed an infringement action against United Rentals in the Western District of Texas on 13 August 2023, asserting five patents covering intelligent call routing, telephony control, and auction-based entity matching. The case was voluntarily dismissed without prejudice by Patent Armory on 19 February 2025 under Rule 41(a)(1)(A)(i), before United Rentals filed an answer or any dispositive motion.
Patent Armory asserted five patents: US9456086B1 (intelligent communication routing system and method), US10491748B1 (method and system for matching entities in an auction), US7269253B1, US7023979B1 (telephony control systems with intelligent call routing), and US10237420B1. The portfolio spans application dates from the early 2000s through 2017.
United Rentals avoids any infringement finding and faces no recorded cost liability. However, the without-prejudice designation means Patent Armory retains the right to refile the same claims. United Rentals cannot invoke res judicata or claim preclusion from this dismissal. The litigation risk is deferred rather than extinguished.
Yes. A dismissal without prejudice under Rule 41(a)(1)(A)(i) preserves the plaintiff’s right to refile, subject to applicable statutes of limitations and any applicable two-dismissal rule under Rule 41(a)(1)(B). No court has ruled on the merits of the asserted patents, so Patent Armory’s enforcement rights remain legally intact.
The Western District of Texas, and Judge Albright’s Waco division specifically, became one of the most popular venues for NPE patent litigation due to favourable scheduling practices, high case volumes, and historically plaintiff-friendly procedural timelines. Patent Armory’s selection of this forum is consistent with broader NPE filing patterns in the district, though judicial transfer and venue reforms have moderated some of those advantages in recent years.
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