Linfo IP v. AllBirds: Voluntary Dismissal With Prejudice After 177 Days
Linfo IP, LLC asserted US9092428B1 — a patent covering systems and methods for discovering and presenting information in text content — against footwear brand AllBirds, Inc. in the Western District of Texas. The plaintiff voluntarily dismissed all claims with prejudice before AllBirds filed an answer, closing the case in under six months.
Pre-answer dismissal with prejudice signals a swift strategic exit
On April 22, 2024, Linfo IP, LLC filed a patent infringement action against AllBirds, Inc. in the Western District of Texas, asserting US9092428B1 — a patent directed to systems, methods, and user interfaces for discovering and presenting information in text content. Linfo IP is a patent assertion entity represented by Ramey LLP, a Houston-based firm with a high volume of patent infringement filings in Texas federal courts.
On October 15, 2024 — 177 days after filing — Linfo IP filed a Notice of Voluntary Dismissal under FRCP 41(a)(1)(A)(i), dismissing all claims against AllBirds with prejudice. Because AllBirds had not yet served an answer or motion for summary judgment, the dismissal was self-effectuating under Fifth Circuit precedent and required no court order. The with-prejudice designation means Linfo IP cannot reassert the same claims against AllBirds based on the same patent.
The timeline is consistent with a negotiated resolution or a strategic decision to exit before incurring the cost of substantive litigation. The public record is silent on whether any settlement or licensing agreement was reached. What is notable is the speed: the case never progressed beyond the complaint stage, and AllBirds was never required to mount a formal defence. The cost-sharing order — each party bears its own fees — is standard for self-effectuating dismissals of this type and does not indicate a monetary judgment.
Filing to Voluntary dismissal in 177 days
177 days — resolved before any answer or summary judgment motion was filed
Dismissed with prejudice: what the voluntary exit means for both parties
FRCP 41(a)(1)(A)(i): self-effectuating dismissal before any answer
Rule 41(a)(1)(A)(i) allows a plaintiff to unilaterally dismiss an action without court approval by filing a notice before the defendant serves an answer or motion for summary judgment. The dismissal is self-effectuating — the case terminates the moment the notice is filed. The Fifth Circuit confirmed this principle in In re Amerijet Int’l, Inc. (785 F.3d 967). The with-prejudice designation was elected by the plaintiff, not imposed by the court.
FRCP 41(a)(1)(A)(i) — plaintiff-electedWith prejudice bars Linfo IP from refiling these claims against AllBirds
A dismissal with prejudice operates as a final adjudication on the merits, preventing the plaintiff from re-asserting the same patent claims against the same defendant in any future action. Linfo IP’s explicit election of this designation — rather than the default without-prejudice treatment — typically signals either a settlement with a covenant not to sue, or a calculated decision that further litigation would be unproductive. The public record does not confirm which.
Final as to AllBirds — bars refilingAllBirds exits without admitting liability or filing a single defence pleading
AllBirds never served an answer, filed a motion, or engaged publicly with the merits of the infringement allegations. The case closed without any finding of infringement, invalidity, or liability. For AllBirds, the with-prejudice dismissal provides lasting protection against Linfo IP reasserting US9092428B1 on the same claims. No defendant law firm of record appears in the public docket, suggesting the matter may have been resolved through direct commercial negotiation.
No liability finding — protected from refilingUS9092428B1 remains enforceable against other defendants
The dismissal with prejudice extinguishes Linfo IP’s claims only as against AllBirds. The patent itself is unaffected — its validity was never challenged in this proceeding, and Linfo IP retains the right to assert it against other parties. Companies operating text-discovery, content-recommendation, or in-app search interfaces in the retail or e-commerce sector should note that this patent remains an active enforcement asset in the hands of a prolific PAE filer.
Patent survives — third-party risk remainsFull 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 | AllBirds, Inc. | Company | AllBirds, Inc. — direct-to-consumer sustainable footwear and apparel brandSearch 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 Western District CourtSearch in Eureka ↗ |
Official order — verbatim text
The court’s order confirms the dismissal was self-effectuating under FRCP 41(a)(1)(A)(i) and required no judicial merits determination. The plaintiff’s explicit election of with-prejudice treatment — rather than the neutral default — is the operative legal fact: it forecloses any future claim by Linfo IP against AllBirds on the same patent. The cost-sharing order is procedurally standard for this dismissal type and does not reflect a prevailing-party determination. No substantive findings on infringement or validity were made.
US9092428B1 — Text content discovery system and user interface
US9092428B1 is a US patent granted under application number US13/709827, covering systems, methods, and user interfaces designed to discover and present information embedded within text content. The patent sits at the intersection of information retrieval, natural language processing, and interface design — technology domains that underpin modern search, content recommendation, and in-app discovery features. Its B1 designation indicates it issued without any post-grant amendment.
For the retail and e-commerce sector, this patent is strategically significant because product-search interfaces, editorial content surfaces, and recommendation widgets on consumer-facing websites may fall within its claim scope. Linfo IP’s decision to assert it against AllBirds — a DTC brand whose digital presence is central to its business model — suggests the patent holder views consumer retail websites as viable enforcement targets. The patent’s validity remains untested, and its claim language warrants close analysis by any company operating similar text-discovery functionality.
Should your product team run an FTO against US9092428B1?
Any company operating a consumer-facing digital platform with on-site search, content discovery, or text-based recommendation features should treat US9092428B1 as a live enforcement risk. Linfo IP has demonstrated willingness to assert this patent against e-commerce brands, and the patent’s validity has never been challenged in proceedings. In-house IP teams at DTC retailers, content platforms, and SaaS providers with text-interface products are the primary audience for an FTO assessment.
PatSnap Eureka’s FTO Search Agent can map the claim language of US9092428B1 against your product’s technical architecture, surface relevant prior art that could inform an invalidity opinion, and flag other active Linfo IP or Ramey LLP assertions in the same technology space. Running this analysis before receiving a demand letter — rather than after — is the most cost-effective posture for teams building or acquiring text-discovery functionality.
Run a freedom-to-operate analysis on US9092428B1 to assess your product’s exposure
Run FTO in Eureka →Similar text-discovery patent cases in W.D. Texas federal court
Cases involving information retrieval and text-interface patents asserted by PAEs in the Western District of Texas federal court, with comparable pre-answer dismissal outcomes.
What this case signals for the text content discovery IP landscape
A pre-answer PAE dismissal with prejudice in W.D. Texas is a recognised pattern — but the with-prejudice election carries distinct strategic weight.
Pre-answer dismissals by PAEs often follow a licensing resolution
When a patent assertion entity voluntarily dismisses with prejudice before the defendant files any response, it is commonly consistent with a confidential licence or covenant not to sue. The public record here is silent on terms, but the combination of speed (177 days), no defendant counsel of record, and a with-prejudice election suggests the matter was resolved commercially rather than abandoned.
W.D. Texas remains a high-volume venue for PAE text-technology assertions
The Western District of Texas continues to attract patent assertion entities filing claims in the information retrieval and content technology space. Ramey LLP has a high volume of filings in this court. Companies with consumer-facing digital interfaces — particularly those operating search, recommendation, or text-curation features — face elevated exposure to similar assertions in this venue.
Linfo v AllBirds — key questions answered
A dismissal with prejudice in Linfo IP v. AllBirds (7:24-cv-00106) means Linfo IP permanently relinquished its right to assert US9092428B1 against AllBirds on the same claims. It operates as a final adjudication on the merits, even though no court ever ruled on infringement or validity. The dismissal was self-effectuating under FRCP 41(a)(1)(A)(i) and required no judicial order.
The public docket does not disclose a settlement agreement. However, the combination of a with-prejudice voluntary dismissal, no defendant counsel of record, and resolution before any answer was filed is commonly consistent with a confidential licensing arrangement or covenant not to sue. The plaintiff’s election of with-prejudice treatment — rather than without prejudice — suggests the matter was commercially resolved rather than simply abandoned.
US9092428B1 covers systems, methods, and user interfaces for discovering and presenting information in text content — technology relevant to on-site search, content recommendation, and text-based navigation features on digital platforms. AllBirds operates a direct-to-consumer e-commerce website with product discovery functionality, which likely brought it within the scope of the patent holder’s enforcement campaign. The patent’s validity has not been adjudicated.
No. The with-prejudice dismissal under FRCP 41(a)(1)(A)(i) bars Linfo IP from reasserting the same patent claims against AllBirds in any future action. This protection is specific to AllBirds — US9092428B1 remains enforceable by Linfo IP against other defendants, and no validity determination was made in this proceeding.
Ramey LLP, led by William P. Ramey III, is a Houston-based patent litigation firm with a high volume of patent infringement filings in Texas federal courts, frequently on behalf of patent assertion entities. The firm regularly files cases in the Western District of Texas. In cases of this type, pre-answer voluntary dismissals — particularly with-prejudice dismissals — are a recurring feature of their filing pattern, often suggesting rapid licensing resolution.
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