Mark Andrew Perry

Mark Andrew Perry is a distinguished patent litigator focusing on complex appellate matters, particularly high-stakes patent appeals. He has been recognized as a premier appellate lawyer in intellectual property and technology, often described as "the best patent appeal lawyer in the country" by legal publications. While the provided case data indicates his direct appearances have been plaintiff-side, his broader practice as lead outside appellate counsel for major global companies suggests involvement across the spectrum of patent disputes.

Mr. Perry is Co-Head of Weil, Gotshal & Manges LLP's Appeals and Strategic Counseling practice, based in Washington, D.C., a role he assumed in 2022. Prior to joining Weil, he was a partner and Co-Chair of the nationwide Appellate and Constitutional Law Practice Group at another international law firm. His practice at Weil encompasses appeals and strategic counseling across various business litigation areas, including intellectual property. The firm's patent litigation experience spans diverse sectors such as semiconductors, high tech, telecom, pharmaceutical and biotechnology therapeutics, and medical devices.

Notably, Mr. Perry has argued and won landmark decisions before the U.S. Supreme Court, including the influential patent eligibility case Alice Corp. v. CLS Bank. He also handled an untitled case as lead counsel at the district court level and another as lead appellate counsel, both on the plaintiff side. While his profile does not specifically detail regular appearances in PTAB or IPR proceedings, his appellate and strategic counseling roles suggest engagement with appeals originating from tribunals such as the Patent Trial and Appeal Board (PTAB). He was honored as the "U.S. Appellate Practitioner of the Year" by Managing Intellectual Property Americas Awards in 2026.

Mr. Perry earned his J.D. with high honors from the University of Chicago Law School, where he was Executive Editor of the Law Review. He gained foundational experience clerking for Justice Sandra Day O'Connor of the U.S. Supreme Court and Judge Alex Kozinski of the Ninth Circuit. He is admitted to practice in California and the District of Columbia, as well as before the U.S. Supreme Court and the U.S. Court of Appeals for the Federal Circuit.