Roberta Horton focuses her practice on trademark, domain name, and copyright law. She handled one of the first cases challenging domain name infringers, and assisted in writing the statute protecting trademark owners against domain name infringers. She litigates both before the federal courts and the Trademark Trial and Appeal Board.

Ms. Horton has represented clients in many industries including: sports, food, telecommunications, tobacco, and hospitality. She also represents numerous nonprofits, including the environmental organization EarthShare and the largest children's literacy organization nationwide, Reading Is Fundamental.

Ms. Horton has been ranked in Chambers (Washington DC region), IP Legal 500 and listed in the 2010 Guide to the World's Leading Women in Business Law.

Ms. Horton is a summa cum laude graduate of Yale University and a graduate of Yale Law School. Prior to joining the firm, she clerked on the US Court of Appeals for the Fourth Circuit for the Honorable Sam J. Ervin III.


  • Major tobacco company in enforcing its rights in its name and logo, which consistently is among the top ranked brands in the country.
  • Philip Morris v. Otamedia. One of the leaders of a national team representing Philip Morris USA Inc. in its pursuit of numerous vendors who sold, over the Internet to US customers, illegally imported MARLBORO® cigarette. Obtained judgment of US$173,734,291.62 Led submission of amicus brief on behalf of 18 companies and trade associations in Rosetta Stone Ltd. v. Google Inc., Docket No. 10-2007, which was the subject of significant national attention.
  • Mladenovic v. Swarovski North America Limited et al. Representation of defendants in copyright case.
  • Philip Morris v. New Image Global, Inc. Representation of plaintiff in trademark suit.


"Reserve" Can't be Reserved: The Limitations on Descriptive Terms as Trademarks
Seller Beware: Consumer Protection Insights for Industry
Extensive IP Provisions in the Trans-Pacific Partnership
Arnold & Porter Advisory
The Trans-Pacific Partnership Agreement Would Affect Diverse Sectors of the Global Economy
Arnold & Porter Advisory
New Uber Lawsuit Highlights Importance of Carefully Vetting Proposed New Marks

Seller Beware: Consumer Protection Insights for Industry

Search and Confuse: Potential Trademark Liability for On-line Retailers

Seller Beware: Consumer Protection Insights for Industry



Chambers USA
Intellectual Property: Trademark, Copyright & Trade Secret (DC) (2015-2016)
Managing Intellectual Property
"IP Star" (2013-2016)
Washingtonian Magazine
"Top Lawyers" for Intellectual Property (2011, 2013)


  • JD, Yale Law School, 1986
  • BA, Yale University, 1983, summa cum laude
  • District of Columbia
  • United States Court of Appeals, Fourth Circuit, The Honorable Sam J. Ervin
  • German

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