James L. Day

  • 415.954.4414
  • |
Jim Day is a partner in Farella Braun + Martel’s Intellectual Property Litigation Department and the head of our Patent Office Litigation practice group.


Mr. Day has more than 18 years of experience in state and federal courts litigating intellectual property and complex commercial disputes for internet and other high technology companies.  His degree in electrical engineering/computer science and experience working as a software engineer and consultant provide a technical proficiency and credibility with judges, juries, and his client’s internal technical experts.


Mr. Day’s practice emphasizes patent disputes, in federal court and before the Patent Trial and Appeals Board, and trade secret misappropriation lawsuits.  Recent experience includes: 

  • Lead counsel in inter partes review (IPR) proceedings challenging patents in a range of technological areas including virus protection software, electronic locks, and lighting-protected gas tubing.
  • Defending patent infringement lawsuits related to network connectivity devices in the Eastern District of Texas and the District of Delaware.
  • Defending hard disk drive manufacturer in trade secret and patent infringement actions related to testers for hard disk drives filed in the Northern District of California.
  • Representing a video-networking platform provider in asserting its patents related to digital broadcast over cable telecommunications networks filed in the District of Delaware.
  • Representing a pharmaceutical company in connection with a licensing dispute involving its block-buster prostate cancer drug.


  • American Bar Association’s Intellectual Property and Litigation Sections
  • American Intellectual Property Law Association (AIPLA)
  • Member, Advisory Board, All Stars Project of the San Francisco Bay Area, non-profit organization dedicated to providing developmental opportunities for inner-city youth