Peter J Armenio

Practice Areas

Peter J. Armenio, Co-Chair of Cahill’s Intellectual Property Litigation and Life Sciences Patent Litigation practices, focuses his practice on intellectual property matters, including pharmaceutical, biotechnology, and medical device patent litigation and counseling. Peter has represented clients at the forefront of these areas for three decades, including in their most important “bet the company” matters. Peter has also handled a wide range of other patent and related commercial matters in courts across the country and in national and international arbitrations. He has represented clients ranging from the Fortune 100 to start-ups to non-profit organizations.

Peter has been recognized by Chambers USA as a leading lawyer in intellectual property every year since 2007, and has been similarly recognized by Chambers Global every year since 2013. Chambers has noted in various years that Peter is "a fantastic trial lawyer," "one of the brightest ANDA litigators out there today," "tremendously strategic in setting up a case," and has a "track record of winning."

Peter was named the Patent Strategy Attorney of the Year (New York) at the LMG Life Sciences 2024 Americas Awards. Peter has also been listed in a number of other guides and rankings, including IAM Global Leaders 2025, Managing Intellectual Property magazine's "America's Best Life Sciences Litigators," Benchmark Litigation, the IAM Patent Litigation 250, and IAM Patent 1000. IAM has reported client comments that "he is one of the smartest lawyers out there and handles cases expertly and efficiently, obtaining great results at a reasonable cost – often through facilitating early wins."

Expert in these Jurisdictions

New York

US District Court for the Eastern District of New York

US District Court for the Southern District of New York

US District Court for the Eastern District of Michigan

US Court of Appeals for the Federal Circuit

US Patent and Trademark Office

US Supreme Court

Education