Daralyn J. Durie

Daralyn J. Durie: Patent Litigation Summary

Daralyn J. Durie is a nationally recognized trial lawyer with a practice focused on high-stakes patent litigation, particularly in the technology and life sciences sectors. Her work spans a wide range of technologies, including software, cybersecurity, gaming, medical devices, and pharmaceuticals, including biosimilars. While the provided case list shows only defense-side representations for clients like Viant Technology and Niantic, her broader practice history demonstrates extensive experience representing both plaintiffs and defendants.

Ms. Durie has a record of significant trial outcomes for prominent clients. Notable defense victories include securing a non-infringement jury verdict for Aptiv in a patent case concerning automotive technology, and successfully defending Epic Games, Sony, and Palo Alto Networks in separate patent suits, eliminating hundreds of millions of dollars in potential exposure. On the plaintiff side, she has secured major verdicts, including a $178 million jury award in a patent infringement case involving melanoma therapy. She has also represented Genentech in significant patent matters, including litigation over the blockbuster drug Herceptin and the enforcement of the Cabilly patents. Her practice includes work before the Patent Trial and Appeal Board, where she obtained a favorable IPR decision for Genentech.

Ms. Durie is a partner at Morrison Foerster, which her boutique firm, Durie Tangri LLP, joined in 2023. She co-founded Durie Tangri in 2009 after beginning her career and making partner at Keker & Van Nest. She is a Fellow of the American College of Trial Lawyers and has been recognized as a leading IP litigator by numerous legal publications.

She earned her J.D. from the University of California, Berkeley, School of Law, after receiving an A.B. from Stanford University and an M.A. from UC Berkeley. Following law school, she clerked for Judge Douglas Ginsburg on the U.S. Court of Appeals for the D.C. Circuit.