Damir Cefo

Summary — Damir Cefo (Patent Litigation Practice)

Damir Cefo is a New York-based patent litigator whose practice centers on computer hardware and software, electronic and electromechanical devices, and MPEG/video compression technology, with additional work in trademarks and copyrights (Cohen & Gresser bio). His tracked docket reflects a focus on patent-owner-side work: he appeared as counsel for Razdog Holdings LLC (defending the patent owner against Unified Patents' challenge) and as Partner for plaintiff BSD Crown, Ltd. against Amazon, AWS, and Twitch. That said, his broader bio shows genuine two-sided experience — including defending major Korean and Japanese notebook/computer manufacturers in multi-defendant hardware, graphics, and peripheral patent cases — so the 1-plaintiff/1-defendant tracked split understates a balanced practice that leans toward patentee representation, including NPE/assertion contexts.

Firm context and notable cases. Cefo is a partner at Villegas & Cefo LLP (with Francisco Villegas, formerly of Armstrong Teasdale) and has been Of Counsel at Cohen & Gresser LLP in New York since 2004, practicing there through his own CEFO P.C.; earlier he was an associate at Stroock & Stroock & Lavan (2002–2004) and practiced at Baker Botts LLP. His most prominent tracked matter is BSD Crown, Ltd. v. Amazon.com, Inc. (N.D. Cal.), where he appeared pro hac vice for the Israeli patent holder (formerly Emblaze Ltd.) asserting streaming-quality and cloud-gaming patents (including U.S. Patent 8,934,887) against Amazon Luna, AWS, and Twitch — litigation still pending as of mid-2026. In Unified Patents, LLC v. Razdog Holdings LLC, he represented the patent owner against Unified's ex parte reexamination of U.S. Patent 10,334,068, which the CRU instituted in May 2025. Firm-published matter summaries also attribute to his career a $166 million coronary-stent damages award, an ITC/Federal Circuit enforcement campaign for a disposable-camera patentee, and defense of computer manufacturers.

PTAB/IPR experience. Cefo has substantial post-grant exposure: his firm bio specifically cites experience with AIA inter partes review, CBM, ex parte reexamination, and reissues for both patent owners and petitioners, and Villegas & Cefo LLP served as patent-owner counsel in the related Twitch-initiated IPRs against Razdog (IPR2025-00307/-00308). He is registered before the USPTO and admitted in New York, the S.D.N.Y., E.D.N.Y., and the Federal Circuit; he holds a J.D. from Ohio State (2000) and a B.S. in electrical and computer engineering from Ohio State (1997).