Knobbe/Martens: Intellectual Property Law
Ben Katzenellenbogen

Ben Katzenellenbogen


At a Glance

  • J.D. Harvard Law School
  • B.S. General Chemistry, University of California - Los Angeles

  • State Bar of California
  • U.S. Court of Appeals for the Federal Circuit
  • U.S. Court of Appeals for the Ninth Circuit
  • U.S. District Court - Central District of California
  • U.S. District Court - Northern District of California
  • U.S. Patent and Trademark Office

Professional Profile 

Benjamin A. Katzenellenbogen has been litigating intellectual property disputes for nearly two decades, with an emphasis on patent litigation, particularly pharmaceutical cases in the Hatch-Waxman context. Ben regularly appears in district courts throughout the country, as well as in California state courts.

Ben has represented clients across a broad range of technologies, and has considerable experience in trademark, trade secret, copyright, unfair competition, and state law issues.  Exemplary engagements are listed in the Exemplary Engagements section, organized by legal issue and technology area.

Ben has represented generic drug manufacturers in Hatch-Waxman litigation involving generic versions of a number of drugs, including: Seroquel XR® (first-to-file), Nexium® (first-to-file), Provigil® (first-to-file), Antara®, Intuniv®, and Oxecta®. 

Ben has handled cases throughout the litigation process, from preliminary injunctions and motions to dismiss, to class certification, Markman (claim construction), and summary judgment, all the way through trial and post-trial motions.  He has argued before the United States Court of Appeals for the Ninth Circuit and the California Court of Appeal, and appeared before the Federal Circuit.

Ben holds a B.S. in General Chemistry from the University of California – Los Angeles (UCLA) and a J.D. from Harvard Law School. He served as a Judicial Clerk to Judge Ronald M. Whyte at the U.S. District Court for the Northern District of California (San Jose division).

Ben has been selected for inclusion in the "Southern California Super Lawyers" list by Super Lawyers magazine for his work in intellectual property litigation. 

Clerk Experience

Clerk to the Honorable Ronald M. Whyte in the Northern District of California, San Jose Division, 1999‑2000.


  • Harvard Law School (J.D. 1999), cum laude
  • University of California - Los Angeles (B.S. General Chemistry 1996), summa cum laude
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