Patent Armory v. InspereX LLC: Five Routing Patents, Dismissed in 53 Days
Patent Armory, Inc. filed suit against InspereX LLC in the Northern District of Illinois asserting five patents spanning intelligent call routing, telephony control, and auction-matching systems. The case resolved in just 53 days when Patent Armory filed a voluntary dismissal under Rule 41(a)(1)(A)(i) before InspereX had answered or moved for summary judgment.
Five Patent Infringement Claims Dropped Before InspereX Could Respond
On 6 September 2024, Patent Armory, Inc. filed a patent infringement complaint against InspereX LLC in the United States District Court for the Northern District of Illinois (Case No. 1:24-cv-08166), before Judge Matthew F. Kennelly. The complaint asserted five patents — US9456086B1, US10491748B1, US7269253B1, US7023979B1, and US10237420B1 — covering intelligent communication routing systems, telephony control with intelligent call routing, and methods for matching entities in an auction context.
The action was terminated on 29 October 2024 when Patent Armory filed a notice of voluntary dismissal pursuant to Federal Rule of Civil Procedure 41(a)(1)(A)(i). Under this procedural mechanism, a plaintiff may dismiss an action as of right before the defendant has served an answer or a motion for summary judgment. The public record does not specify whether the dismissal was with or without prejudice; Rule 41(a)(1)(A)(i) dismissals are presumed without prejudice absent an express statement to the contrary, though practitioners should verify the filed notice directly.
The 53-day duration is notably short and suggests the parties may have reached an early commercial resolution, or that Patent Armory elected to withdraw strategically — for example, to refile in a different venue or to reassess claim scope. Because InspereX never answered, no invalidity defenses or counterclaims entered the record, leaving the asserted patents technically unchallenged. The precise commercial terms, if any, driving the dismissal remain unknown from the public record.
Filing to Voluntary dismissal in 53 days
53 days — well below the median district court patent case duration of 2+ years
Voluntarily dismissed: what Rule 41(a)(1)(A)(i) means for both parties
Rule 41(a)(1)(A)(i): plaintiff’s unilateral right to exit
Federal Rule of Civil Procedure 41(a)(1)(A)(i) permits a plaintiff to dismiss an action without a court order at any time before the defendant serves an answer or a motion for summary judgment. Here, InspereX had done neither, so Patent Armory exercised this right freely. No judicial approval was required, and no merits determination was made on any of the five asserted patents.
No merits rulingWith or without prejudice? The public record is silent
A Rule 41(a)(1)(A)(i) dismissal is presumed without prejudice unless the notice expressly states otherwise — meaning Patent Armory could theoretically refile the same claims against InspereX. However, the public docket entry describes only ‘Voluntary dismissal’ without specifying the prejudice qualifier. Practitioners should review the filed notice directly before drawing conclusions about refiling rights or claim preclusion.
Prejudice status unconfirmedInspereX escapes without a merits finding — but exposure may persist
InspereX obtained termination of this action without having to answer, file invalidity contentions, or incur full litigation costs. However, because no court ruled on validity or infringement of the five asserted patents, InspereX received no defensive judgment. If the dismissal was without prejudice, Patent Armory retains the option to refile, and InspereX’s freedom-to-operate position with respect to these patents remains unresolved.
No invalidity ruling securedEarly exit leaves five routing patents legally intact and re-assertable
None of the five patents — covering intelligent call routing, telephony control systems, and auction-entity matching — were adjudicated invalid or not infringed. For competitors and potential targets in communications routing and financial technology, these patents remain active enforcement tools. The abrupt withdrawal after 53 days, consistent with early settlement or strategic repositioning, suggests Patent Armory may revisit these claims against InspereX or other defendants.
Patents remain enforceableFull party and counsel information
| Role | Name | Type | Detail |
|---|---|---|---|
| Plaintiff | Patent Armory, Inc. | Company | Patent licensing entity — holder of US9456086B1 and four further routing and auction-matching patentsSearch in Eureka ↗ |
| Defendant | InspereX LLC | Company | InspereX LLC — fixed-income securities distribution and technology platform providerSearch in Eureka ↗ |
| Plaintiff counsel | Isaac Philip 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 | Daniel Patrick Flaherty | Attorney | Counsel for InspereX LLCSearch in Eureka ↗ |
| Defendant law firm | Foley & Lardner, LLP | Law Firm | Representing InspereX LLCSearch in Eureka ↗ |
| Presiding judge | Judge Matthew F. Kennelly | Judge | Illinois Northern District CourtSearch in Eureka ↗ |
Official order — verbatim text
The dismissal notice invokes Rule 41(a)(1)(A)(i) and confirms that InspereX had not answered nor moved for summary judgment, satisfying the procedural preconditions for a unilateral plaintiff exit. No merits determination was made on validity, infringement, or damages across any of the five asserted patents. The notice is silent on prejudice, leaving the refiling question technically open. This procedural posture is consistent with either an undisclosed licensing resolution or a strategic withdrawal pending reassessment.
US9456086B1 — Intelligent Communication Routing System and Method
The five asserted patents span two related technical domains: intelligent communication routing (US9456086B1, US10491748B1, US7269253B1, US7023979B1) and auction-based entity matching within routing systems (US10237420B1). The application dates range from the early 2000s (US10/385389, US11/387305) through to more recent filings (US15/797070, US15/856729), suggesting a portfolio deliberately built to capture both legacy telephony infrastructure and modern cloud-based routing implementations. The patents describe systems that dynamically route calls or messages based on real-time decision logic, potentially covering IVR, ACD, and skills-based routing architectures widely deployed in financial services contact centres.
For a fintech and fixed-income distribution firm like InspereX, the relevance of intelligent routing patents may appear non-obvious — but firms operating electronic trading platforms, client communication systems, or order-routing infrastructure could plausibly be mapped to claim language covering ‘matching entities in an auction’ or ‘intelligent call routing.’ The breadth of these patents, combined with the plaintiff’s apparent willingness to assert them across sectors, makes them a credible threat to any company routing communications or matching counterparties electronically. The portfolio’s multi-application structure also suggests continuation claims may be pending.
Should you run an FTO against US9456086B1 and the Patent Armory routing portfolio?
Any business deploying intelligent call routing, IVR, skills-based routing, or electronic auction-matching systems — particularly in financial services, insurance, or technology-enabled contact centres — should treat this portfolio as a live FTO concern. Patent Armory’s willingness to assert these patents against a fixed-income distribution platform suggests claim language is being read broadly. Product and engineering teams building or procuring routing middleware, ACD systems, or counterparty-matching engines should validate their design-around options before a complaint arrives.
PatSnap Eureka’s FTO Search Agent can map the claim language of US9456086B1, US10491748B1, US7269253B1, US7023979B1, and US10237420B1 against your product architecture in minutes, identifying overlap risk and surfacing prior art that could support an IPR petition. Eureka also monitors Patent Armory’s continuation filings and assignment history in real time, alerting your team if new related claims publish — so your IP function stays ahead of the next assertion rather than reacting to it.
Run a freedom-to-operate analysis on US9456086B1 to assess your product’s exposure
Run FTO in Eureka →Similar Intelligent Routing and Telephony Patent Cases in the N.D. Illinois
Cases involving intelligent call routing, IVR, and auction-matching patents asserted in the Northern District of Illinois by NPE plaintiffs against technology and financial services firms.
What this case signals for the communications routing IP landscape
A five-patent assertion dropped before any defense was filed raises questions about strategy, valuation, and the durability of routing IP claims in fintech-adjacent sectors.
Pre-answer dismissals often precede refiling or out-of-court resolution
When a patent plaintiff withdraws under Rule 41(a)(1)(A)(i) this early, it typically signals either a licensing payment reached quietly before formal proceedings began, or a tactical reset — a venue change, claim amendment, or reassessment of damages. Companies operating in intelligent routing or auction-matching technology should monitor Patent Armory’s filing activity for follow-on actions.
Five unchallenged patents remain a live threat for routing technology operators
Because InspereX never filed an answer or IPR petition, all five patents emerged from this case without any validity challenge on the record. US9456086B1, US10491748B1, US7269253B1, US7023979B1, and US10237420B1 are each individually assertable in future litigation. Businesses deploying intelligent call routing, IVR, or electronic auction-matching systems should treat these as active risk vectors.
Patent v InspereX — key questions answered
Patent Armory, Inc. filed a patent infringement action against InspereX LLC on 6 September 2024 in the Northern District of Illinois, asserting five patents covering intelligent call routing and auction-matching systems. The case was voluntarily dismissed by Patent Armory on 29 October 2024 under Rule 41(a)(1)(A)(i), before InspereX had answered the complaint. The case lasted 53 days and produced no merits ruling.
Patent Armory asserted five US patents: US9456086B1 (intelligent communication routing system), US10491748B1, US7269253B1 (telephony control system with intelligent call routing), US7023979B1, and US10237420B1 (method and system for matching entities in an auction). The portfolio spans application dates from the early 2000s through to more recent filings, suggesting broad temporal coverage of routing technology.
Rule 41(a)(1)(A)(i) allows a plaintiff to dismiss an action as of right — without court approval — before the defendant has served an answer or a motion for summary judgment. Here, InspereX had done neither, so Patent Armory could and did withdraw unilaterally. The dismissal carries no merits finding on validity or infringement. It is presumed without prejudice absent express contrary language in the notice, meaning Patent Armory could potentially refile.
The public record describes the termination as ‘Voluntary dismissal’ without specifying whether it is with or without prejudice. A Rule 41(a)(1)(A)(i) dismissal defaults to without prejudice, which would permit refiling. However, practitioners should review the actual filed notice for any express prejudice language. A second dismissal after refiling would likely operate as an adjudication on the merits under Rule 41(a)(1)(B), the so-called ‘two-dismissal rule.’
Companies deploying intelligent call routing, IVR, skills-based routing, or electronic auction-matching systems should conduct a freedom-to-operate analysis against Patent Armory’s five asserted patents. Because none were invalidated in this proceeding, they remain fully enforceable. Firms should also monitor Patent Armory’s filing activity for new assertions and assess whether IPR petitions at the PTAB could neutralise claim risk before any refiling occurs.
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