John M. Guaragna

I'll research this attorney's background before writing the summary.

Let me dig into the specific tracked cases and PTAB experience.

John M. Guaragna — Patent Litigation Practice Summary

Focus and firm context. Guaragna is a partner at DLA Piper (US) in Austin and serves as Texas Chair of the firm's Intellectual Property and Technology practice; his DLA Piper tenure, including the legacy DLA Piper Rudnick Gray Cary entity, dates to at least 2004. His practice centers on patent and other technology disputes in the Texas district courts — the Western and Eastern Districts, where he is admitted — and before the ITC and FTC. Technology coverage spans semiconductor fabrication/foundry process technology, AI and server hardware, digital displays, wireless/network offloading, consumer electronics and retail, computer security, medical devices, and consumer apparel. He also handles trademark, trade secret, copyright, indemnity, and patent/antitrust matters, including a three-month FTC antitrust trial.

Side preference. The tracked record is uniformly defense-side: 0 plaintiff appearances against 4 defendant appearances, with three as lead counsel. That is consistent with his firm bio and Chambers USA commentary, which describe him as regularly defending patent infringement disputes (Chambers USA ranks him Band 3, Intellectual Property – Texas), and with DLA Piper's 2026 announcement that Patexia's Patent Litigation Intelligence Report ranked him #1 patent litigator for representation of defendants and #1 overall. His recurring posture is defending operating companies — NVIDIA, Samsung, Oracle, Walmart, lululemon, Medtronic, KLA, Silicon Labs — against assertions by NPE/PAE plaintiffs.

Notable tracked and reported matters. Confirmed in public dockets: Headwater Research LLC v. Apple Inc. (W.D. Tex., Judge Albright, filed Aug. 27, 2025), in which he entered an appearance for Apple against wireless network offloading patents, and the Marlin Semiconductor/Longitude Licensing campaign (IPValue subsidiaries asserting former UMC semiconductor fabrication patents against Apple, Broadcom, Qualcomm, TSMC, and others in the W.D. Tex., E.D. Tex., and ITC), where he appears on the defense side as counsel; TSMC and Apple have petitioned for IPR against several of the asserted Marlin patents. Orthosie Systems, LLC v. SVR, LLC is tracked with him as lead defense counsel, but I could not verify case details through public sources, so no substance should be attributed to it. Reported results include summary judgment of § 101 ineligibility for Walmart in Q Tech v. Walmart (on appeal), summary judgment of non-infringement for lululemon in Blackbird v. lululemon (affirmed, then settled), a defense win for KLA in the Xitronix Walker Process antitrust case (Federal Circuit affirmed 2019; cert denied), and a no-violation ITC determination for Silicon Labs in Certain Television Tuners (337-TA-910).

PTAB/IPR and credentials. He is primarily a district court and ITC litigator rather than a high-volume PTAB filer, but IPRs and CBMs appear as defensive tools in his matters — Click-to-Call v. Oracle was stayed pending IPR and all asserted claims were invalidated by the USPTO, and St. Isidore settled after CBMs were instituted. He has also published on stays pending IPR (Lexology, 2014). Bar admissions: California and Texas; registered in the Federal Circuit, Fifth Circuit, and multiple Texas and California district courts. Education: J.D., University of San Diego (1998); B.A., Villanova University.