Patent Armory v. Yoshinoya America: Four Call Routing Patents, Dismissed in One Day
Patent Armory Inc filed an infringement action in the Northern District of Texas against Yoshinoya America Inc, asserting four patents covering intelligent communication routing and telephony control systems. The case was voluntarily dismissed without prejudice just one day after filing — before the defendant had answered or engaged counsel of record.
A one-day patent filing: strategic shot or accidental misfiling?
On June 17, 2024, Patent Armory Inc filed Case No. 3:24-cv-01505 in the Northern District of Texas before Judge Sam A. Lindsay, asserting infringement of four patents — US10491748B1, US7269253B1, US7023979B1, and US10237420B1 — against Yoshinoya America Inc. The asserted patents relate to intelligent communication routing systems, telephony control with intelligent call routing, and auction-based entity matching methods, collectively spanning a broad set of automated call-handling and routing technologies.
The case was terminated just one day later on June 18, 2024, when Patent Armory filed a notice of voluntary dismissal under Federal Rule of Civil Procedure 41(a)(1)(A)(i). That procedural vehicle is available only before the defendant serves an answer or a motion for summary judgment — confirming that Yoshinoya America had not yet formally responded. The public record does not specify whether the dismissal was with or without prejudice beyond the Rule 41(a)(1)(A)(i) notice itself, which under the Federal Rules operates as a dismissal without prejudice by default unless the plaintiff has previously dismissed the same claims.
A one-day lifespan is notable even by the standards of NPE-driven patent filings. The absence of any defendant counsel, cost ruling, or substantive filing beyond the complaint and dismissal notice leaves the strategic rationale opaque. Possibilities consistent with the public record include a pre-litigation settlement, a misfiled complaint, or a deliberate placeholder filing ahead of a refiled action in a different forum. Whether Patent Armory intends to refile against Yoshinoya America or redirect enforcement efforts elsewhere remains unknown from available filings.
Filing to Voluntary dismissal in 1 days
Closed in 1 day — among the shortest-lived patent actions in the district
Voluntarily dismissed: what the Rule 41 notice means for both parties
Rule 41(a)(1)(A)(i): unilateral dismissal before any defendant response
Federal Rule of Civil Procedure 41(a)(1)(A)(i) permits a plaintiff to dismiss an action as of right — without a court order — provided the defendant has not yet served an answer or a motion for summary judgment. Patent Armory exercised this right within 24 hours of filing. The notice is self-executing and terminates the case automatically upon filing.
Pre-answer dismissalWith or without prejudice? The public record is silent
Under Rule 41(a)(1)(A)(i), a first voluntary dismissal is without prejudice by default, meaning Patent Armory retains the right to refile the same claims against Yoshinoya America. However, if Patent Armory has previously dismissed the same claims against this defendant, the ‘two-dismissal rule’ would convert the dismissal to one with prejudice. The public docket does not disclose prior filings between these specific parties, so prejudice status cannot be confirmed from available records.
Refiling risk openYoshinoya America exits with no judgment — but exposure may persist
Yoshinoya America incurred no adverse ruling and faced no cost order, having never formally appeared in the action. However, a dismissal without prejudice does not extinguish the underlying patent claims. The four asserted patents remain in force, and the defendant cannot rely on res judicata or claim preclusion to block a future action on the same patents. Continued monitoring of Patent Armory’s enforcement activity is advisable.
No judgment, exposure openEnforcement pattern: call routing patents remain live weapons
Patent Armory’s four asserted patents cover intelligent call routing, telephony control, and auction-based entity matching — technology embedded in customer-service infrastructure across food-service, retail, and hospitality sectors. The rapid dismissal is consistent with NPE portfolio enforcement patterns where filings serve as negotiation leverage rather than litigation intent. Companies relying on third-party call routing or IVR platforms should assess exposure under these patents regardless of this case’s outcome.
NPE enforcement patternFull party and counsel information
| Role | Name | Type | Detail |
|---|---|---|---|
| Plaintiff | Patent Armory Inc | Company | Patent assertion entity — holder of US10491748B1 and three further call routing patentsSearch in Eureka ↗ |
| Defendant | Yoshinoya America Inc | Company | Yoshinoya America Inc — U.S. subsidiary of the Japanese fast-food chain YoshinoyaSearch in Eureka ↗ |
| Plaintiff counsel | Isaac Philip Rabicoff | Attorney | Counsel for Patent Armory IncSearch in Eureka ↗ |
| Plaintiff counsel | Michael Scott Fuller | Attorney | Counsel for Patent Armory IncSearch in Eureka ↗ |
| Plaintiff law firm | Garteiser Honea PC | Law Firm | Representing Patent Armory IncSearch in Eureka ↗ |
| Plaintiff law firm | Rabicoff Law LLC | Law Firm | Representing Patent Armory IncSearch in Eureka ↗ |
| Presiding judge | Judge Sam A. Lindsay | Judge | Texas Northern District CourtSearch in Eureka ↗ |
Official order — verbatim text
The dismissal notice invokes Rule 41(a)(1)(A)(i) and expressly confirms that Yoshinoya America had not answered or moved for summary judgment — establishing this as a unilateral, pre-response termination. The phrasing ‘without prejudice’ in the notice preserves Patent Armory’s right to refile on the same claims. No merits determination was made, no claim construction occurred, and neither patent validity nor infringement was adjudicated. The record is consistent with a negotiated resolution, a strategic withdrawal, or a refiling in a different forum.
US10491748B1 — Intelligent communication routing system and method
US10491748B1 (application no. US15/797070) covers an intelligent communication routing system and method — technology that automates the distribution and handling of inbound calls or contacts based on configurable routing logic. The co-asserted patents US7023979B1 and US10237420B1 address overlapping telephony control and routing domains, while US7269253B1 covers an auction-based entity matching method, extending the portfolio’s reach into dynamic allocation systems. Together, the four patents span foundational infrastructure for automated customer contact management.
For any business operating customer-facing telephony, IVR, or contact-centre infrastructure — including restaurant chains, hospitality groups, and retail operators — these patents present a non-trivial monitoring obligation. Patent Armory’s decision to assert all four in a single complaint against a food-service company suggests the portfolio is being deployed broadly across sectors that rely on third-party communication platforms. The patents’ age spread (earliest priority potentially pre-2003 for US7023979B1) means prior art arguments may be available, but claim-by-claim analysis is essential before relying on invalidity as a defence.
Should you run an FTO against US10491748B1 and the Patent Armory portfolio?
Any company deploying intelligent call routing, IVR, automated contact distribution, or dynamic entity-matching in customer service workflows should treat this patent cluster as an active FTO priority. The food-service sector is an atypical target for telephony patents — which suggests Patent Armory is casting a wide net across any business with inbound call infrastructure, regardless of industry vertical. If your product or platform directs, scores, or allocates inbound communications, these four patents warrant review.
PatSnap Eureka’s FTO Search Agent can map the full claim scope of US10491748B1, US7269253B1, US7023979B1, and US10237420B1 against your technology stack in minutes — identifying which claims pose the highest overlap risk and surfacing prior art that may support invalidity arguments. Eureka also tracks Patent Armory’s full enforcement history, so you can monitor whether a refiled action against Yoshinoya America or new defendants in your sector is underway.
Run a freedom-to-operate analysis on US10491748B1 to assess your product’s exposure
Run FTO in Eureka →Similar call routing and telephony patent cases in U.S. district courts
Cases involving NPE assertion of intelligent call routing and telephony control patents in the Northern District of Texas and peer venues, including rapid Rule 41 dismissals.
What this case signals for the call routing and telephony IP landscape
A one-day filing against a food-service brand over communication routing patents is a pattern worth tracking across the hospitality and retail sectors.
Rule 41 dismissals in NPE cases rarely signal the end of enforcement
When a patent assertion entity dismisses without prejudice within 24 hours of filing — before the defendant has even retained counsel — the most commercially rational explanation is a rapid pre-litigation resolution or a strategic redirect. The underlying patents survive intact, and the plaintiff retains full rights to refile. Treat this as a pause, not a conclusion.
Four patents across two technology clusters raises portfolio breadth concerns
Asserting patents spanning intelligent routing (US10491748B1, US7023979B1, US10237420B1) and auction-based entity matching (US7269253B1) in a single complaint suggests Patent Armory is testing the broadest possible claim scope against call-handling infrastructure. Companies using automated customer-contact systems — including IVR, ACD, or AI-assisted routing — should review exposure across all four patent families.
Patent v Yoshinoya — key questions answered
Patent Armory filed an infringement complaint in the Northern District of Texas on June 17, 2024, asserting four patents covering intelligent call routing and telephony control against Yoshinoya America Inc. The case was voluntarily dismissed under Rule 41(a)(1)(A)(i) the following day, before the defendant had answered or retained counsel of record.
The Rule 41(a)(1)(A)(i) notice filed by Patent Armory references dismissal ‘without prejudice.’ Under the Federal Rules, a first voluntary pre-answer dismissal is without prejudice by default, preserving the plaintiff’s right to refile. The public docket does not disclose any prior action between these parties that would trigger the two-dismissal rule.
Patent Armory asserted four patents: US10491748B1 (intelligent communication routing system), US7269253B1 (method and system for matching entities in an auction), US7023979B1 (telephony control system with intelligent call routing), and US10237420B1 (intelligent communication routing — related application). The products identified include intelligent communication routing systems, auction-based entity matching, and telephony control.
Food-service and hospitality companies typically rely on third-party telephony platforms, IVR systems, or customer contact infrastructure that may implement routing logic covered by patents like those asserted here. NPE enforcement campaigns often target end-users of licensed technology rather than the platform vendors themselves, making industry-vertical targeting broader than it might first appear.
Based on the public record, yes. A Rule 41(a)(1)(A)(i) dismissal without prejudice does not bar refiling the same claims. Yoshinoya America cannot assert res judicata or claim preclusion from this dismissal. If Patent Armory has not previously dismissed the same claims against the same defendant, the two-dismissal rule does not apply, and refiling remains procedurally available.
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