Bill Nash



Education and Clerkships

J.D., St. Mary's University School of Law, with distinction; Phi Delta Phi; John M. Harlan Society; Articles Editor, St. Mary's Law Journal

B.S., Ocean Engineering, U.S. Naval Academy



U.S. Patent and Trademark Office

Canadian Intellectual Property Office

Court Admissions

U.S. District Court for the District of Colorado

Texas Supreme Court, 1988

U.S. District Court for the Eastern District of Texas, 1990

U.S. District Court for the Northern District of Texas, 1990

U.S. District Court for the Southern District of Texas, 1990

U.S. District Court for the Western District of Texas, 1989

U.S. Court of Appeals for the Federal Circuit, 1991

U.S. Court of Appeals for the Fifth Circuit, 1991

U.S. Court of Appeals for the Tenth Circuit, 1991


William B. ("Bill") Nash is a partner in Haynes and Boone's Intellectual Property Litigation Practice in the firm's San Antonio and Dallas offices. Bill is a registered patent attorney and litigator with more than 30 years of extensive national and international experience in intellectual property.

As a litigator, Bill protects his clients' rights and is often called upon in critical company litigation. He has handled major patent infringement, trademark infringement, copyright infringement, unfair competition, and trade secret cases in jurisdictions from California to Massachusetts, including the U.S. International Trade Commission (ITC) in Washington, D.C., in addition to those filed in the four federal districts within Texas. As an intellectual property advisor and expert, he has broad experience in infringement and validity opinions, and he regularly helps clients develop strategies to avoid or minimize litigation risks. Bill works closely with his clients to protect, develop, commercialize, and license a company's IP assets, both in the U.S. and internationally. He has been responsible for more than 4,000 trademark filings around the world and has been lead attorney on more than 100 proceedings before the Trademark Trial and Appeal Board.

Bill is AV® Peer Review Rated Preeminent by Martindale-Hubbell® Law Directory and was recognized by World Trademark Review's WTR 1000, Globe Business Publishing, Ltd. in 2017-2018. Additionally, Bill was recognized by San Antonio Scene, Scene Monthly LLC, in Best San Antonio Lawyers for Intellectual Property Litigation, 2015. He also received the Outstanding Lawyer Award by San Antonio Business Journal, American City Business Journals, in 2016.

Professional and Community Activities

  • State Bar of Texas
  • Fellow, State Bar Foundation
  • American Intellectual Property Law Association
  • International Trademark Association


Bill regularly handles:
  • Licenses 
  • Research and Development Agreements 
  • Software Agreements 
  • Distributorship Agreements 
  • Mergers and Acquisitions 
  • Assignments and Transfer Agreements 
  • Employment Agreements 
  • Franchise Agreements 
  • Consultant Agreements 
  • Commercialization Agreements 


World Trademark Review

World Trademark Review Ranks Haynes and Boone in U.S. Top 20

The World Trademark Review 1000 (WTR 1000), a directory of the world’s leading trademark professionals, has again ranked Haynes and Boone among the top 20 trademark practices in the nation and as the preeminent large firm in Texas.

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