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Diane J. Mason

44 Montgomery Street
Suite 3100
San Francisco, California 94104
Phone:  415.913.4911
Fax:  415.391.8766


Ms. Mason focuses her practice on assisting national and international clients develop, maintain and protect their trademark portfolios. She advises clients on the clearance of marks, and has globally prosecuted hundreds of trademarks involving well-known consumer brands and goods. Ms. Mason also works with clients to aggressively enforce trademarks, copyrights and patents in federal and state courts, as well as before the U.S. Trademark Trial and Appeal Board and ICANN.

Additionally, Ms. Mason counsels clients in all aspects of their trademark use to protect the strength of their marks and reduce the risk of infringement liability.

Legal Experience

  • LeClairRyan, San Francisco, California, June 2011 – Present
  • Bullivant Houser Bailey PC, San Francisco, California

Memberships and Affiliations

  • San Francisco Intellectual Property Law Association
  • International Trademark Association (INTA)
  • California State Bar Association: Member, Intellectual Property Section

Related Industries


  • J.D., University of Houston Law Center, 1993
  • B.S., University of California, Davis, 1984

Bar Admissions

  • California

Court Admissions

  • U.S. Patent and Trademark Office
  • U.S. Court of Appeals for the Federal Circuit
  • U.S. Court of Appeals for the Ninth Circuit