profile picture of Seth Lloyd

Seth W. Lloyd

Partner | Washington, D.C.

Seth Lloyd, a member of Morrison Foerster’s Appellate and Supreme Court practice, has been counsel in more than a hundred appeals in federal and state courts nationwide. Seth has presented oral arguments in the U.S. Courts of Appeals for the D.C. Circuit, the Seventh Circuit, the Ninth Circuit, and the Federal Circuit, as well as in the New Jersey Appellate Division.

Seth has particular experience in patent appeals before the Federal Circuit. He has authored successful briefs for both patentees and defendants on a wide range of technologies, from medical devices to pharmaceuticals to computer hardware and software. His practice includes appeals from district courts, the Patent Trial and Appeal Board, and the International Trade Commission. Seth also has argued five times in the Federal Circuit. His winning arguments include a successful reversal of three PTAB decisions in a consolidated appeal for a computer memory designer. Seth is co-chair of the Federal Circuit Bar Association’s Administrative Law & Regulatory Committee. And he is an Editor of Morrison Foerster’s Federal Circuitry blog, which takes a data-driven approach to analyzing the Federal Circuit and its decisions.

Seth regularly practices in the United States Supreme Court. He has drafted petitions and amicus briefs at the certiorari stage, as well as party and amicus briefs at the merits stage. Seth also moots members of the bar for Supreme Court arguments through the Georgetown Supreme Court Institute and is a member of the Edward Coke Appellate Inn of Court.

Seth’s clients and peers recognize his expertise. Legal 500 named Seth a Key Lawyer; Super Lawyers called him a Rising Star; and Best Lawyers in America added him to its Ones to Watch list, all for appellate practice.


Key Lawyer

Legal 500 2022, 2023

Ones to Watch

Best Lawyers in America 2021-2024