John R.O'Donnell (Jack)


Los Ángeles +

Jack O'Donnell represents clients in technical and high-stakes litigation, focusing on patent and trade secret disputes before U.S. District Courts, the International Trade Commission (ITC), and the Patent Trial and Appeal Board (PTAB). He has played significant roles in seven patent trials in U.S. District Courts.

Jack has experience at every stage of the litigation process. He has contributed to multiple patent jury trials representing both patentees and accused infringers, prepared witnesses for trial and depositions, designed demonstrative presentations for trial, taken and defended expert and fact depositions, authored several briefs, including case-dispositive motions, and assisted with discovery management. His cases have included medical devices, digital cameras, complementary metal oxide semiconductor (CMOS) image sensors, digital and analog transceivers, machine learning algorithms, video game software, and sapphire crystal sheets.

Prior to joining Jones Day in 2022, Jack was part of the trial team representing Nikon Corporation that won two significant jury verdicts in the Central District of California within a five-month period, defeating all patent infringement allegations by Carl Zeiss AG and ASML Netherlands B.V.

Jack is also one of only seven lawyers who have served as the patent program judicial clerk at the United States District Court for the Central District of California, where he advised seven judges on hundreds of patent cases and helped to prepare over 100 substantive patent orders, including more than 25 claim construction orders.


  • NXP Netherlands defends patent infringement claims in Western District of TexasJones Day defended NXP Semiconductors Netherlands B.V. in a patent infringement lawsuit brought by its competitor Impinj, Inc. in the Western District of Texas.