Guy Yonay

Summary — Guy Yonay (Pearl Cohen Zedek Latzer Baratz)

Guy Yonay is a partner in Pearl Cohen Zedek Latzer Baratz's Patent Litigation and Post-Grant Proceedings Group, working from the firm's New York and Tel Aviv offices. His practice concentrates on patent litigation and adversarial USPTO proceedings (IPRs and reexaminations) for high-tech clients, with firm materials citing software, computer hardware, telecommunications (including standard-essential patents), electronics, and imaging/display systems. His electrical engineering background (B.Sc., Cooper Union) underpins a docket that has also touched medical devices, NFC/RFID, and data-compression technologies.

All three tracked appearances are defendant-side (3 of 3), representing operating technology companies — Array Networks and Reduxio Systems — against Realtime Data LLC, a patent-licensing entity. His district-court practice is therefore predominantly defense-side, though his PTAB work spans both petitioner and patent-owner roles. His entire tracked and searchable career is at Pearl Cohen (previously Pearl Cohen Zedek Latzer LLP), where he has been lead counsel in IPRs since at least 2013; no prior-firm history surfaced in reliable sources. IAM Patent 1000 ranks him Bronze for litigation, highlighting his IPR/reexamination work.

His most prominent tracked matter is the Realtime Data campaign: in Realtime Data LLC v. Array Networks Inc., 556 F. Supp. 3d 424 (D. Del. 2021), the court dismissed all asserted data-compression patent claims under § 101/Alice, and the Federal Circuit affirmed in August 2023 (No. 21-2251). He has also been lead appellate and IPR counsel in the 3G Licensing v. Honeywell/Telit Cinterion series, including a Federal Circuit reversal of the PTAB's obviousness ruling (Honeywell v. 3G Licensing, No. 23-1354, Jan. 2025) and a February 2025 partial vacatur-and-remand in which the court commended his "helpful illustration" at oral argument (per the firm).

Yonay appears regularly before the PTAB as lead or backup counsel (e.g., iOnRoad v. Mobileye IPR2013-00227; EndyMed IPR2024-00843; Jeisys Medical v. Serendia IPR2024-00384), and has argued multiple IPR appeals at the Federal Circuit, including Sisvel Int'l v. Sierra Wireless (2023). He is admitted in New York (1997) and California (2016), to the Federal Circuit and the Israel Bar, and before the USPTO (Reg. No. 52,388); he holds a J.D. from Harvard Law School (1996).