Deborah Sirias


Deborah Sirias is a partner in the Los Angeles office of Lewis Brisbois and a member of the Intellectual Property & Technology Practice. She has more than 37 years of experience in the areas of intellectual property law and technology and entertainment law.

She handles the following types of matters:

  • Copyright and trademark infringement actions
  • Trade secret and unfair competition litigation
  • Entertainment litigation, including rights of privacy, publicity, defamation and other entertainment related actions
  • Business torts and other complex business litigation

Primary Area(s) of Practice

  • Intellectual Property & Technology

Additional Experience



Ninth Circuit Court of Appeals

United States District Courts of California (Northern, Central, Southern and Eastern Districts)


  • Board of Directors Association of Southern California Defense Counsel (Intellectual Property Section)
  • Los Angeles County Bar Association (Intellectual Property Section)
  • Beverly Hills Bar Association (Intellectual Property/Entertainment Section)
  • International Trademark Association
  • Board of Directors, Uncommon Good 
  • Founding Member, Board of Directors, New West Charter Middle School, Pacific Palisades
  • Founding Member, Everychild Foundation (Pacific Palisades)

Awards & Honors

  • Southern California Super Lawyers Magazine, 2007-2013, Intellectual Property Litigation
  • Martindale-Hubbell, AV Rating (highest rating for ethics and professionalism)
  • Phi Beta Kappa, University of Southern California, 1978


Southwestern University School of Law

Juris Doctor, 1981

University of Southern California

Bachelor of Arts, 1978

Graduate Institute of International Studies, Geneva, Switzerland

Certificate, 1977


“Understanding the Law and Economics of Intellectual Property Law," December 2004

Representative Matters

Ms. Sirias’ recent experience includes such matters as:

  • Litigation of copyright infringement cases in the textile design area 
  • Litigation of numerous trademark infringement including cases dealing with domain names and high profile litigation involving use of trademark for cosmetics
  • Trade secret misappropriation matters including cases involving patent technology and trademark infringement dispute involving dynamic light scattering devices used to measure particles in a liquid solution
  • Cases involving claims under the Computer Fraud and Abuse Act and Stored Communications Act
  • Litigation involving trademark infringement related to use of University of Southern California's trademark on dental implant

Published and Unpublished Decisions

  • L.A. Printex Indust., Inc. v. Aeropostale, Inc., et al. 2010 U.S. Dist. LEXIS 73235; 94 U.S.P.Q.2D (BNA) 1754 (C.D. Cal. May 5, 2010)
  • LA Printex Indus., Inc. v. William Carter Co., 2010 U.S. Dist. LEXIS 73235 (C.D. Cal. July 2, 2010).
  • Hollywood Athletic Club Licensing Corp. v. GHAC-Citywalk, Andrew Galef, et al., 938 F.Supp. 612 (C.D. Cal. 1996)
  • Crystaplex Plastics, Ltd. v. Redevelopment Agency of the City of Barstow, (2000) 77 Cal.App. 4th 990
  • Tamrac, Inc. v. California Insurance Guarantee Association, (1998) 63 Cal.App. 4th 75
  • Arminak & Associates, Inc. v. St. Gobain Calmar, Inc. 2006 WL 819740 (C.D. Cal. 2007).