John J. Feldhaus is a partner and intellectual property lawyer with Foley & Lardner LLP. Mr. Feldhaus concentrates his practice in patent litigation involving electronic and computer technologies and has been lead counsel in numerous cases on subject matter, including confocal microscopy, computer power management, plasma enhanced continuous vapor deposition, dynamic random access memories and liquid crystal display technology. He is a member of the firm's Intellectual Property Litigation Practice.

Mr. Feldhaus began his career as a patent examiner for the U.S. Patent and Trademark Office in 1974.