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Leonard D. Messinger


Areas of Practice:

  • Trademarks
  • Trade Names
  • Trade Dress
  • Copyrights
  • Trade Secrets
  • Unfair Competition
  • Patent Litigation
  • Internet Matters
  • Business Matters

Bar Admissions:

  • California
  • U.S. Court of Appeals for the 9th Circuit
  • U.S. Court of Appeals for the Federal Circuit
  • U.S. District Court for the Central District of California
  • U.S. District Court for the Northern District of California
  • U.S. District Court for the Southern District of California
  • U.S. District Court for the Eastern District of Michigan


Southwestern University School of Law, Los Angeles, California, 1978, Juris Doctor 

  • Law Review: Southwestern Law Review, Member

Temple University, Philadelphia, Pennsylvania, 1974, B.A. 

  • Honors: Cum Laude

Representative Clients:

  • Dolco Packaging Corp v. Creative Industries, Inc., 1 USPQ 23 1538 (C.D. Ca. 1986)
  • Break-Away Tours Inc. v. British Caledonian Airways, 8 USPQ2d 1140 (SD CA 1986)
  • Gassaway v. Business Maschine Security, 9 USPQ 2d 1572 (C.D. Ca. 1988)
  • Chalais v. Milton Bradley Co., 39 USPQ2d 1197 (SD NY 1996)

Professional Associations:

  • Los Angeles County Bar Association – Member
  • California State Bar, Intellectual Property Section – Member

Past Employment:

  • Nilsson, Robbins, Dalgarn, Berliner, Carson and Wurst, Partner
  • Robbins Berliner & Carson, Partner
  • Fulbright and Jaworski, Los Angeles, Of Counsel

Published Works:

  • "Companies Should Keep Client Lists Confidential", Los Angeles Daily Journal, 1998
  • "Information on Internet Domain Names", San Diego Commerce, 1997
  • "Protect Your Trademarks Abroad", San Diego Commerce, 1997
  • "How To Own Copyrights", San Diego Commerce, 1997
  • "Registered Mark May Prevent Domain Name Battle", Los Angeles Daily Journal, 1996
  • "Landlords Face Vicarious Liablility for Tenant Counterfeiting", 1996
  • "Patent Twists", Los Angeles Daily Journal - California Law Business, 1996
  • "Oh Mana! - The High Burden of Proving Color As A Trademark", Los Angeles Metropolitan News-Enterprise, 1995
  • "Can Blue, Pink or Maybe Green-Gold Be Trademark Protected?", Los Angeles Metroploitan News-Enterprise, 1995

LEONARD D. MESSINGER received his B.A. cum laude in 1974 from Temple University at Philadelphia, Pennsylvania and his J.D. degree in 1978 from Southwestern University, where he was a member of the Southwestern University Law Review. Mr. Messinger's professional practice includes patent litigation, and office practice and litigation in the areas of trademarks, trade names, trade dress, copyrights, trade secrets, unfair competition, Internet matters and related business matters, including licensing and contract negociation. Mr. Messinger has prosecuted numerous trademark applications in the United States Patent and Trademark Office, and represented clients in trademark proceedings before the Trademark Trial and Appeal Board. He has had extensive experience in prosecuting trademarks in foreign countries.

Mr. Messinger is admitted to practice in California, the 9th Circuit and Federal Circuit Courts of Appeal, the federal district courts for the Central, Northern and Southern Districts of California, and the Federal District Court for the Eastern District of Michigan. He is a member of the Los Angeles County Bar Association, and the Intellectual Property Section of the California State Bar.