Secure Mobile Transactions v. Frost Bank: Payment Auth Patent Dispute Ends in 176 Days
Secure Mobile Transactions LLC filed suit in the Eastern District of Texas asserting three patents covering mobile payment card authentication against Frost Bank. The parties jointly moved to dismiss — plaintiff’s claims extinguished with prejudice, defendants’ counterclaims preserved — closing the case in under six months.
A rapid joint exit from a multi-bank authentication patent dispute
On April 8, 2025, Secure Mobile Transactions LLC filed an infringement action in the Eastern District of Texas (Case No. 9:25-cv-00118) against Frost Bank, asserting three U.S. patents — US11288647B2, US9792596B2, and US10546285B2 — directed at systems for authenticating the identity of a payment card holder during merchant transactions. The accused product was Frost Bank’s personal debit and credit card authentication system, including the Personal Frost Debit Card platform.
The case closed on October 1, 2025, via a joint motion to dismiss that reveals the full scope of the litigation: the verdict references a consortium of co-defendants including Bank of Texas, Charles Schwab Bank, Comerica Bank, Independent Bank, Prosperity Bank, Regions Bank, and WoodForest entities, suggesting coordinated defense across multiple financial institutions. Plaintiff’s claims were dismissed with prejudice — permanently extinguishing its right to re-assert these patents against these defendants — while defendants’ counterclaims and defenses were dismissed without prejudice, leaving their invalidity or other affirmative positions available for future proceedings.
Resolution in 176 days is notably swift for a multi-defendant patent case in E.D. Texas, and the joint nature of the motion strongly suggests a negotiated settlement or licensing agreement reached outside the public record. The asymmetric dismissal structure — plaintiff’s claims with prejudice, defendants’ counterclaims without — is a standard settlement architecture that prevents the plaintiff from re-filing while preserving defendant optionality. The financial terms, if any, remain undisclosed.
Filing to Case Dismissed in 176 days
176 days — faster than the E.D. Texas median for patent cases reaching full disposition
Joint dismissal with prejudice: what the asymmetric order means for both parties
With-prejudice dismissal permanently bars re-filing against these defendants
A dismissal with prejudice operates as a final judgment on the merits, preventing Secure Mobile Transactions from reasserting US11288647B2, US9792596B2, or US10546285B2 against any of the named defendants in this consolidated action. The joint motion — filed by all parties — signals a consensual resolution rather than a litigated defeat, but the legal effect is the same: plaintiff’s claims against this defendant group are permanently extinguished.
Res judicata bars re-filingPlaintiff exits permanently — terms of any compensation are not public
By agreeing to dismiss its claims with prejudice, Secure Mobile Transactions accepted a final bar against these defendants. This is consistent with a confidential licensing or settlement payment — a common outcome in NPE litigation where the plaintiff’s commercial objective is monetisation rather than injunctive relief. No financial terms are disclosed in the public record. What is certain is that the plaintiff cannot return to court on these same patents against these same defendants.
Likely settled — terms undisclosedDefendants’ counterclaims preserved — invalidity arguments remain live
The without-prejudice dismissal of defendants’ counterclaims and defenses is a critical asymmetry. Frost Bank and co-defendants retain the ability to challenge the validity of the asserted patents in a future forum — including via IPR petitions at the USPTO — should Secure Mobile Transactions assert these patents against other targets or attempt to revisit related claims. This preserved optionality is a standard defensive concession extracted in NPE settlements.
IPR pathway remains openMulti-bank coordinated defense signals sector-wide licensing exposure
The involvement of at least ten financial institutions in a single joint motion suggests coordinated legal strategy — possibly a joint defense agreement — which is increasingly common when NPEs assert payment technology patents broadly. Regional and community banks operating card authentication systems should treat this case as a signal that similar assertion campaigns may follow. The three patents-in-suit cover core authentication workflows that are widely implemented across the U.S. banking sector.
Sector-wide assertion riskFull party and counsel information
| Role | Name | Type | Detail |
|---|---|---|---|
| Plaintiff | Secure Mobile Transactions LLC | Company | Patent assertion entity — holder of US11288647B2, US9792596B2, and US10546285B2Search in Eureka ↗ |
| Defendant | Frost Bank | Company | Frost Bank — Texas-based regional bank offering debit and credit card authentication servicesSearch in Eureka ↗ |
| Plaintiff counsel | Hannah D. Price | Attorney | Counsel for Secure Mobile Transactions LLCSearch in Eureka ↗ |
| Plaintiff counsel | Larry Dean Thompson , Jr. | Attorney | Counsel for Secure Mobile Transactions LLCSearch in Eureka ↗ |
| Plaintiff counsel | Matthew J. Antonelli | Attorney | Counsel for Secure Mobile Transactions LLCSearch in Eureka ↗ |
| Plaintiff counsel | Rehan Mohammed Safiullah | Attorney | Counsel for Secure Mobile Transactions LLCSearch in Eureka ↗ |
| Plaintiff counsel | Zachariah Harrington | Attorney | Counsel for Secure Mobile Transactions LLCSearch in Eureka ↗ |
| Plaintiff law firm | Antonelli, Harrington & Thompson, LLP | Law Firm | Representing Secure Mobile Transactions LLCSearch in Eureka ↗ |
| Defendant counsel | Alexis Robison | Attorney | Counsel for Frost BankSearch in Eureka ↗ |
| Defendant counsel | Christa Joyce Brown-Sanford | Attorney | Counsel for Frost BankSearch in Eureka ↗ |
| Defendant counsel | Douglas Mark Kubehl | Attorney | Counsel for Frost BankSearch in Eureka ↗ |
| Defendant counsel | James C. Yoon | Attorney | Counsel for Frost BankSearch in Eureka ↗ |
| Defendant counsel | Jamie J Yoo | Attorney | Counsel for Frost BankSearch in Eureka ↗ |
| Defendant counsel | Lucy Yen | Attorney | Counsel for Frost BankSearch in Eureka ↗ |
| Defendant counsel | Morgan Grissum Mayne | Attorney | Counsel for Frost BankSearch in Eureka ↗ |
| Defendant law firm | Baker Botts LLP | Law Firm | Representing Frost BankSearch in Eureka ↗ |
| Defendant law firm | Baker Botts LLP (Dallas) | Law Firm | Representing Frost BankSearch in Eureka ↗ |
| Defendant law firm | Wilson Sonsini Goodrich & Rosati PC (Palo Alto) | Law Firm | Representing Frost BankSearch in Eureka ↗ |
| Defendant law firm | Wilson, Sonsini, Goodrich & Rosati, PC. | Law Firm | Representing Frost BankSearch in Eureka ↗ |
| Presiding judge | Judge Michael J. Truncale | Judge | Texas Eastern District CourtSearch in Eureka ↗ |
Official order — verbatim text
The court’s order reflects a fully consensual exit: both parties jointly moved to dismiss, and the court granted the motion without substantive merits analysis. The asymmetric structure — plaintiff’s claims dismissed with prejudice, defendants’ counterclaims without prejudice — is textbook NPE settlement architecture. It permanently forecloses re-litigation by the plaintiff against these specific defendants while leaving defendants free to challenge patent validity via IPR or other proceedings if the patents are later asserted against third parties. No finding of infringement, validity, or damages was made.
US11288647B2, US9792596B2 & US10546285B2 — Mobile Payment Card Authentication
The three asserted patents — US11288647B2 (App. No. 16/773,614), US9792596B2 (App. No. 14/249,761), and US10546285B2 (App. No. 15/706,361) — form a patent family directed at authenticating the identity of a payment card holder during a request to pay a merchant. The technology covers the authentication workflow embedded in debit and credit card systems, a domain central to modern digital banking infrastructure. The filing sequence across three application numbers suggests a continuation strategy designed to broaden and maintain coverage as the underlying technology evolved.
From a competitive standpoint, these patents sit at the intersection of card-present and card-not-present authentication — a technology layer implemented by virtually every U.S. bank and payment processor. The breadth of the defendant list (ten financial institutions spanning regional and national banks) suggests the claims are drafted broadly enough to read on standard industry authentication flows rather than a proprietary Frost Bank-specific implementation. Any bank, credit union, or fintech operating a card authentication system should treat this patent family as a live assertion risk until all three patents expire.
Should you run an FTO against US11288647B2, US9792596B2, and US10546285B2?
Any financial institution, card network, or payments technology provider that authenticates cardholders during merchant transaction requests should assess exposure to this three-patent family. The claims were broad enough to draw ten co-defendants simultaneously, and the with-prejudice dismissal only protects the named parties. If your product involves debit or credit card identity verification — whether at point-of-sale, mobile wallet, or API-level — these patents warrant direct FTO analysis before product launch or platform expansion.
PatSnap Eureka’s FTO Search Agent can map your authentication product’s feature set against the claim scope of US11288647B2, US9792596B2, and US10546285B2 in minutes, surfacing relevant prior art, identifying claim elements most likely to cover standard authentication flows, and flagging related continuation applications that may extend the assertion risk timeline. Use it to prioritise which claims require design-around analysis and which present the strongest invalidity arguments.
Run a freedom-to-operate analysis on US11288647B2 to assess your product’s exposure
Run FTO in Eureka →Similar payment authentication patent cases in E.D. Texas
Explore comparable NPE infringement actions asserting mobile payment and card authentication patents in the Eastern District of Texas against U.S. financial institutions.
What this case signals for the fintech and banking IP landscape
A rapid, coordinated multi-bank resolution in E.D. Texas highlights how NPE payment patent campaigns are being managed at scale.
Joint defense agreements reduce per-defendant cost in NPE campaigns
The ten-party joint dismissal motion in this case is consistent with a coordinated defense structure where financial institutions pool resources against a common patent assertion. Banks and fintechs facing simultaneous assertion of the same payment authentication patents should evaluate joint defense participation early — it materially reduces litigation spend and strengthens negotiating leverage.
With-prejudice dismissal protects defendants more than settlement alone
Securing a with-prejudice dismissal of plaintiff’s claims — not merely a covenant not to sue — provides stronger preclusion protection. IP counsel advising financial institutions in NPE disputes should insist on this structure as a condition of any resolution, ensuring the plaintiff cannot reassert the same patents in a different jurisdiction or under a successor entity.
Secure v Frost — key questions answered
Secure Mobile Transactions LLC filed suit against Frost Bank in the Eastern District of Texas on April 8, 2025, asserting three patents covering mobile payment card authentication. The case was resolved via a joint motion to dismiss filed by all parties. Plaintiff’s claims were dismissed with prejudice and defendants’ counterclaims were dismissed without prejudice. The case closed October 1, 2025 — 176 days after filing.
Secure Mobile Transactions asserted US11288647B2, US9792596B2, and US10546285B2, all directed at systems authenticating the identity of a payment card holder in a merchant transaction request. The accused product was Frost Bank’s debit and credit card authentication system, including the Personal Frost Debit Card platform.
Dismissal with prejudice operates as a final judgment on the merits, permanently barring Secure Mobile Transactions from reasserting the three patents against the named defendants. The plaintiff cannot re-file these same claims against Frost Bank or any of the co-defendants listed in the joint motion, regardless of future product changes or new arguments.
The without-prejudice dismissal of defendants’ counterclaims and defenses preserves their right to challenge the validity or enforceability of the asserted patents in a future proceeding — including via IPR petitions at the USPTO — if those patents are later asserted against them or third parties. This asymmetric structure is standard in NPE settlements: the plaintiff gives up its claims permanently while defendants retain defensive options.
No. The with-prejudice dismissal only protects the specific defendants named in the joint motion: Frost Bank, Bank of Texas, Charles Schwab Bank, Comerica Bank, Independent Bank, Prosperity Bank, Regions Bank, WoodForest Financial Group, WoodForest Financial Services, and WoodForest National Bank. All three patents — US11288647B2, US9792596B2, and US10546285B2 — remain in force and can be asserted against any other financial institution or fintech not party to this action.
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