Patent litigation attorney

Michael M. Rosen

2 tracked appearances — 0 plaintiff · 2 defendant.

Specialty & background

Michael M. Rosen is an intellectual property litigator with a focus on patent law and cross-border disputes. He is recognized for his experience across diverse technology areas including computer hardware and software, consumer devices, telecommunications, biotechnology, and medical devices.

Rosen primarily represents high-tech clients, universities, venture capital firms, and startups, including those based in Israel. His tracked case history shows two appearances on the defendant side, defending clients in patent infringement actions. He has been counsel for defendants in matters such as DataTreasury Corporation v. Bank of America (while at Foley & Lardner) and Resmed Corp. v. Fractus, S.A. (while at Kobre & Kim). Notably, he previously represented Fractus S.A. in patent infringement actions against major U.S. cellular carriers, obtaining a favorable out-of-court settlement and transfer of a patent portfolio after a trial in the U.S. District Court for the Eastern District of Texas. Other significant trial outcomes include a complete defense verdict of non-infringement for Fresenius Medical Care against Baxter Healthcare, a multimillion-dollar jury verdict for SRI International against Symantec, and a complete defense verdict for Volcano Corporation against St. Jude Medical.

He is currently Counsel at Irell & Manella LLP, having joined their Washington, D.C. office in May 2026. Prior to Irell & Manella, he was an intellectual property litigator at Kobre & Kim, where he was recognized in the IAM Patent 1000 and for his involvement in cross-border IP disputes. His practice also includes U.S. Patent and Trademark Office (PTAB/IPR) proceedings and policy work.

Rosen earned his J.D., cum laude, from Harvard Law School and his B.A., magna cum laude, from Harvard College. He is admitted to practice in California and the District of Columbia, as well as before various U.S. District Courts, the U.S. Court of Appeals for the Federal Circuit, and the U.S. Supreme Court. He is also a Registered Foreign Lawyer in Israel.

Firms

Roles

  • Of Counsel1
  • Counsel1

Cases (2)