Linfo IP v. Charles Tyrwhitt: Text Discovery Patent Dismissed With Prejudice in 88 Days
Linfo IP, LLC asserted US9092428B1 — a patent covering systems, methods, and user interfaces for discovering and presenting information in text content — against apparel retailer Charles Tyrwhitt, Inc. in the Southern District of Texas. The case closed in just 88 days via voluntary dismissal with prejudice under Rule 41(a)(1)(A)(i), permanently extinguishing Linfo’s infringement claims against this defendant.
A swift patent assertion ends permanently before Charles Tyrwhitt responds
On 10 October 2024, Linfo IP, LLC filed suit against Charles Tyrwhitt, Inc. in the U.S. District Court for the Southern District of Texas (Case No. 4:24-cv-03865), asserting infringement of US9092428B1. The patent covers systems, methods, and user interfaces for discovering and presenting information embedded in text content — technology with potential application across e-commerce product pages, search, and content recommendation interfaces. Charles Tyrwhitt is a British menswear retailer with a significant U.S. online presence, making it a plausible target for a UI-layer patent assertion.
The case closed on 6 January 2025 — just 88 days after filing — when Linfo IP filed a notice of voluntary dismissal. The court dismissed the case with prejudice pursuant to Federal Rule of Civil Procedure 41(a)(1)(A)(i). A dismissal with prejudice is final and operates as an adjudication on the merits: Linfo IP is permanently barred from reasserting US9092428B1 against Charles Tyrwhitt on the same claims. No defendant agents or law firms appear on the public docket, suggesting Charles Tyrwhitt had not yet formally appeared when the dismissal was filed.
The 88-day lifespan and absence of any defendant filings is consistent with a pre-litigation settlement or licensing resolution reached before substantive engagement — a pattern frequently observed in NPE-style patent assertion campaigns. Whether a licensing fee changed hands is not reflected in the public record. What is notable is the with-prejudice designation: unlike a without-prejudice dismissal that preserves future optionality, this outcome forecloses all future infringement claims by Linfo IP against Charles Tyrwhitt under this patent, suggesting the parties reached a definitive resolution.
Filing to Voluntary dismissal in 88 days
88 days — resolved before any defendant appearance on the docket
Dismissed with prejudice: what Rule 41 finality means for both parties
Rule 41(a)(1)(A)(i): voluntary dismissal before defendant appears
Under FRCP 41(a)(1)(A)(i), a plaintiff may voluntarily dismiss without a court order by filing a notice before the defendant serves an answer or motion for summary judgment. Here, the court applied a with-prejudice designation, which converts the voluntary act into a final judgment on the merits. This is a stricter outcome than the default Rule 41 dismissal, which is ordinarily without prejudice, and suggests either the parties agreed to this characterisation or the court exercised discretion.
FRCP 41(a)(1)(A)(i) — with prejudiceWith prejudice bars any future reassertion against Charles Tyrwhitt
A with-prejudice dismissal operates as a final adjudication on the merits. Linfo IP cannot refile the same infringement claims under US9092428B1 against Charles Tyrwhitt in any federal court. This is a materially stronger protection for the defendant than a without-prejudice outcome, which would leave the door open for refiling. The public record does not disclose whether a settlement or licence accompanied the dismissal, but the finality of the with-prejudice term typically indicates the matter was fully resolved between the parties.
Permanent bar on reassertionLinfo IP permanently closes this enforcement avenue
For Linfo IP, dismissal with prejudice extinguishes the Charles Tyrwhitt claim entirely. If a licensing fee was received, the outcome may still represent a commercial success for the assertion campaign. However, the with-prejudice term limits any future leverage: Linfo IP cannot use the threat of refiling to extract additional payments from this defendant. The patent US9092428B1 remains valid and enforceable against other parties — only the claim against Charles Tyrwhitt is foreclosed.
US9092428B1 remains live vs. othersE-commerce UI patents: quick resolution signals ongoing assertion risk
The rapid lifecycle of this case — 88 days, no defendant appearance, with-prejudice close — is consistent with a pattern where NPE-style plaintiffs file against multiple defendants and resolve quickly, potentially through licensing. Retailers and e-commerce operators deploying text discovery, content surfacing, or UI recommendation technology should treat this as a signal: US9092428B1 is actively asserted and its holder has demonstrated willingness to file and resolve swiftly. Freedom-to-operate analysis against this patent is advisable for companies with comparable product interfaces.
E-commerce UI — active assertion riskFull party and counsel information
| Role | Name | Type | Detail |
|---|---|---|---|
| Plaintiff | Linfo IP, LLC | Company | Patent assertion entity — holder of US9092428B1 covering text content discovery systemsSearch in Eureka ↗ |
| Defendant | Charles Tyrwhitt, Inc. | Company | British menswear retailer operating significant U.S. e-commerce and retail presenceSearch in Eureka ↗ |
| Plaintiff counsel | William P. Ramey , III | Attorney | Counsel for Linfo IP, LLCSearch in Eureka ↗ |
| Plaintiff law firm | Ramey LLP | Law Firm | Representing Linfo IP, LLCSearch in Eureka ↗ |
| Presiding judge | Judge N/A | Judge | Texas Southern District CourtSearch in Eureka ↗ |
Official order — verbatim text
The court’s order reflects a straightforward procedural close under Rule 41(a)(1)(A)(i), triggered by Linfo IP’s notice of voluntary dismissal. The with-prejudice designation is the legally significant element: it elevates what is typically a unilateral plaintiff act into a final judgment on the merits, permanently barring reassertion of these claims against Charles Tyrwhitt. No merits ruling was issued and no claim construction occurred, meaning the validity and scope of US9092428B1 were not adjudicated in this proceeding.
US9092428B1 — System, methods and user interface for text content discovery
US9092428B1 (application number US13/709827) is a granted U.S. patent covering systems, methods, and user interface technologies for discovering and presenting information contained within text content. The patent sits at the intersection of natural language processing, information retrieval, and front-end UI design — a domain with broad applicability across search engines, e-commerce product pages, content recommendation platforms, and SaaS tools that surface structured or semi-structured data to end users.
For e-commerce operators like Charles Tyrwhitt, whose digital storefronts rely on text-driven product discovery and content presentation layers, patents in this space can implicate core platform functionality. The breadth of the claimed invention — spanning systems, methods, and UI — means potential exposure is not limited to one implementation path. The fact that Linfo IP brought this assertion suggests an active monetisation strategy: companies deploying comparable text discovery or information surfacing features in consumer-facing digital products should treat this patent as a live enforcement risk requiring FTO attention.
Should you run an FTO search against US9092428B1?
Any company operating an e-commerce platform, content discovery tool, or text-based information surfacing interface should consider running a freedom-to-operate analysis against US9092428B1. The patent’s claimed scope — covering systems, methods, and user interfaces for discovering and presenting information in text — is broad enough to potentially implicate product search, contextual recommendations, dynamic content overlays, and NLP-driven browsing features. With active assertion confirmed in this case, the risk is not theoretical.
PatSnap Eureka’s FTO Search Agent allows R&D and IP teams to map their specific implementation against the independent and dependent claims of US9092428B1, identify prior art that may constrain claim scope, and surface related continuation or family patents that could extend the assertion risk profile. Rather than relying on a blanket non-infringement assumption, teams can generate a structured claim chart and prior art landscape report directly within Eureka — reducing outside counsel time and accelerating go/no-go decisions on product features.
Run a freedom-to-operate analysis on US9092428B1 to assess your product’s exposure
Run FTO in Eureka →Similar text discovery and e-commerce UI patent cases in Texas federal courts
Explore related patent infringement actions asserting text discovery, content presentation, and UI patents in the Southern and Eastern Districts of Texas.
What this case signals for the e-commerce UI patent landscape
A rapid with-prejudice close in S.D. Texas suggests a licensing-first enforcement strategy around text discovery and content UI patents.
With-prejudice term protects Charles Tyrwhitt but not the broader market
The dismissal with prejudice conclusively ends Linfo IP’s claim against Charles Tyrwhitt. But US9092428B1 remains enforceable against all other defendants. Retailers, SaaS platforms, and content-driven e-commerce operators with similar UI layers should note that this patent has cleared the filing threshold and should assess their exposure independently.
88-day close before defendant appearance is a hallmark of NPE licensing campaigns
Cases resolved this quickly — before any defence counsel appears on record — typically reflect pre-answer settlement or licensing. The absence of defendant law firms on the docket is consistent with early-stage negotiation rather than contested litigation. Companies receiving demand letters under US9092428B1 should assess the prior art landscape and claim scope before engaging in licensing discussions.
Linfo v Charles — key questions answered
The case was dismissed with prejudice under FRCP 41(a)(1)(A)(i), meaning Linfo IP is permanently barred from reasserting the same infringement claims under US9092428B1 against Charles Tyrwhitt. The dismissal functions as a final adjudication on the merits, even though no substantive ruling on validity or infringement was made by the court.
US9092428B1 covers systems, methods, and user interfaces for discovering and presenting information in text content. E-commerce operators, content platforms, and SaaS tools that surface, filter, or recommend information based on text analysis may fall within the patent’s scope. The patent was actively asserted in this case, confirming it is in a live monetisation phase.
The 88-day duration and absence of any defendant counsel on the docket is consistent with a pre-answer settlement or licensing resolution. Under FRCP 41(a)(1)(A)(i), a plaintiff may dismiss unilaterally before the defendant files an answer, which typically occurs in the early weeks of litigation. The public record does not confirm whether a licence fee was paid.
No. The with-prejudice dismissal only forecloses Linfo IP’s claims against Charles Tyrwhitt. US9092428B1 remains a valid, granted U.S. patent that Linfo IP may assert against other defendants. No invalidity ruling, claim construction order, or IPR proceeding was part of this case, leaving the patent’s scope and validity fully intact.
Ramey LLP represented Linfo IP as plaintiff counsel. The firm is a known patent assertion practice active in Texas federal courts, frequently filing cases on behalf of NPE-style plaintiffs. Their involvement suggests this filing may be part of a broader assertion campaign targeting multiple defendants in the e-commerce and digital UI sector. Companies with similar product interfaces should monitor for related filings.
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