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Mark Sommers
+1 202 408 4064

901 New York Avenue, NW
Washington, DC 20001-4413

+1 202 408 4000
Fax +1 202 408 4400

Bar and Court Admissions

  • District of Columbia
  • Illinois
  • Massachusetts
  • New York


  • University of London, England
    LL.M., 1983
  • Northern Illinois University College of Law
    J.D., 1982
  • Ohio Wesleyan University
    B.A., Economics, 1978

Mark Sommers


Mark Sommers practices exclusively in the areas of trademarks, domain names, dilution, unfair competition, false advertising, cybersquatting, counterfeiting, and related areas of IP. He provides a full range of services in those areas, including U.S. federal court and Trademark Trial and Appeal Board (TTAB) of the U.S. Patent and Trademark Office (USPTO) litigation and appeals, strategic counseling, infringement and clearance opinions, portfolio management and prosecution, empirical research, intermediary liability, and damages.

Mr. Sommers has litigated a broad range of trademark, trade dress, product configuration, unfair competition, domain name, diversion, design, and false advertising cases. He has also orchestrated many domestic and international strategies concerning the acquisition of rights and the enforcement of those rights.

In addition to representing the interests of many top-tier U.S. brand owners, Mr. Sommers has also represented the interests of many European and Asian leading brand owners, where he has gained an appreciation of foreign companies’ sensitivity to U.S. practice and procedure. He frequently presents to both U.S. and international audiences, has authored numerous articles about trademarks, domain names, trade dress, and unfair competition, and regularly provides press commentary on high-profile, newsworthy trademark and related cases, developments, and issues.

Professional Recognition

  • Recognized by The Legal 500 U.S. for trademark litigation, 2007-2017.
  • Ranked among top D.C. trademark lawyers for contentious and non-contentious work in World Trademark Review 1000, 2011-2017.
  • Ranked among top 25 trademark experts in the world by in-house counsel and peers in Legal Media Group's Guide to the World's Leading Lawyers—Best of the Best since 2007; and among top U.S. trademark lawyers in Legal Media Group's Guide to the World's Leading Trademark Law Practitioners since 2006.
  • Recognized by World IP Review as a WIPR Leader for trademarks in the United States, 2016, 2017.
  • Recognized as a leading lawyer by International Who's Who of Trademark Lawyers, 2004-2016.

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