David T. Pritikin

Summary of Professional Practice for David T. Pritikin
Date: 2026-05-01

David T. Pritikin is a senior patent litigator and a long-serving partner at Sidley Austin LLP in Chicago. His practice focuses on complex, high-profile patent disputes across a range of technologies. He has served as lead counsel in numerous cases involving the pharmaceutical, software, medical device, and semiconductor industries. Public records and publications show Mr. Pritikin has held significant leadership positions at his firm, including chair of the national intellectual property practice and member of the firm's Executive Committee.

Mr. Pritikin has represented both plaintiffs and defendants in patent infringement matters. His work for patent holders includes serving as lead counsel for pharmaceutical clients in more than a dozen Hatch-Waxman cases concerning major drug products. He has also defended major technology companies, representing clients such as Microsoft in litigation involving cellular technologies and AT&T Mobility in disputes before the U.S. Court of Appeals for the Federal Circuit. The single tracked case, Health Care Service Corp v. OL Security LLC, shows him as lead counsel for the plaintiff.

Mr. Pritikin has spent his entire professional career at Sidley Austin, which he joined in 1974 after graduating from law school; he was made a partner in 1981. His early practice was in antitrust litigation before he transitioned to focus primarily on intellectual property. While he has extensive experience in federal district courts and has argued before the Federal Circuit, his specific experience in IPR or other PTAB proceedings is not prominent in the public record.

He earned his B.A. from Cornell University in 1971 and his J.D. from Harvard Law School in 1974. He is a member of the Illinois bar.