Xythonic Sues German Company F24 in Marshall on a Personal Safety Network Patent.

Xythonic LLC filed Xythonic LLC v. F24 AG, No. 2:26-cv-00989 (E.D. Tex., Marshall Division), on November 3, 2026. The complaint describes Xythonic as organized under New Mexico law and F24 AG as a German corporation, and pleads venue under 28 U.S.C. § 1391(c) on the ground that the defendant is a foreign corporation, and also alleges acts of infringement in the district. The plaintiff demands a jury.

The patent

The complaint asserts one patent, U.S. Patent 10,375,560, "Personal safety network," which it says issued August 6, 2019 from an application filed June 1, 2018. The patent names Cynthia Goodenough Welch and Keith C. Welch as inventors and describes a network in which authorized members communicate rapidly about threats, emergencies, or other circumstances through mobile devices running an application, an administrative server, and a push notification server. Xythonic pleads that it is the assignee of all right, title, and interest in the patent.

What the complaint alleges

The single count alleges direct infringement by making, using, selling, offering to sell, or importing the "Exemplary Defendant Products," and by internal testing and use, and alleges, on information and belief, that other infringing devices have been made, used, sold, imported, and offered for sale. It alleges induced infringement at least since service of the complaint and claim charts, and pleads actual knowledge through that service. The accused products and the exemplary claims are those identified in the claim charts of Exhibit 2, which the complaint incorporates by reference; the claim charts are not available.

Relief requested

The prayer asks for a judgment that the patent is valid and enforceable and infringed, an accounting, damages under 35 U.S.C. § 284 with interest and costs, and an exceptional case finding with attorneys' fees under § 285.

Where the case stands

Through November 4, 2026, the docket shows the complaint, a notice of appearance, the plaintiff's disclosure statement, the patent and trademark form, and a summons. The court's docket record lists the case as assigned to Judge Rodney Gilstrap and referred to Magistrate Judge Roy S. Payne. Xythonic filed two other patent suits in the Marshall Division the same day, Nos. 2:26-cv-00990 and 2:26-cv-00991. Watch for service on F24 AG, which the complaint describes as a German company, and its response. The case can end at any time, including by settlement or voluntary dismissal.