In the News

Purvi Patel - Letter to INTA Annual Meeting Attendees

Haynes and Boone is proud to have welcomed the 2013 INTA Annual Meeting to Dallas! We hope you had a great time enjoying our city, and that you had one of the most productive INTA Annual Meetings of your career. >>

William B. Nash



2323 Victory Avenue
Suite 700
Dallas, 75219
T +1 214.651.5021
F +1 210.554.0484
M +1 210.363.6274

San Antonio

112 East Pecan Street
Suite 1200
San Antonio, 78205
T +1 210.978.7477
F +1 210.554.0484

Áreas de Practica


  • 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

Bar Admissions

  • Texas
  • U.S. Patent and Trademark Office
  • Canadian Intellectual Property Office

Court Admissions

  • U.S. District Court for the Eastern District of Texas
  • U.S. District Court for the Northern District of Texas
  • U.S. District Court for the Southern District of Texas
  • U.S. District Court for the Western District of Texas
  • U.S. Court of Appeals for the Federal Circuit
  • U.S. Court of Appeals for the Fifth Circuit
  • U.S. Court of Appeals for the Tenth Circuit
William B. Nash

William B. ("Bill") Nash is a partner in Haynes and Boone's Intellectual Property Litigation Practice in the firm's Dallas and San Antonio offices.  Bill is a registered patent attorney and litigator with more than 22 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 over 4,000 trademark filings around the world and has been lead attorney on over 100 proceedings before the Trademark Trial and Appeal Board.

Bill is AV® Peer Review Rated Preeminent by Martindale-Hubbell® Law Directory.

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

Bill works with both large and small corporations and businesses. He has extensive experience representing clients in the following industries:

  • Beverage
  • Biotechnology
  • Consumer Electronics
  • Construction
  • Energy
  • Medical Devices and Therapies
  • Restaurant and Food
  • Retail Stores
  • Software
  • Technology
  • Entertainment/Music Recording

Selected Representative Experience

Steven Busti v. Platinum Studios, Scott Mitchell Rosenberg; Universal Studios, Inc., d/b/a Universal Pictures; and Dreamworks II Distribution Co., LLC, Cause No. A-11-CA-1029-SS (W.D. Texas), appeal at No. 13-50938 (5th Cir. 2013)
Plaintiff claimed that Cowboys and Aliens (the film and graphic novel) violated the copyright of his eleven-page comic of the same name, which he self-published in 1994. After we filed a motion for summary judgment on behalf of the defendants, the court awarded summary judgment in their favor, finding there was independent creation, no access, no factual copying, and no substantial similarity. After appealing to the U.S. Court of Appeals, Fifth Circuit, Plaintiff dropped his appeal.

Wireless Product Patent and Antitrust Litigation
Defense of leading wireless product manufacturer in federal litigation alleging patent infringement and antitrust violations.


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

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