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William J. Voller is an intellectual property attorney focusing on patent litigation and counseling. He has successfully represented patent owners and accused infringers in federal district court and the U.S. International Trade Commission through all stages of litigation, including trial. William has also successfully represented parties on appeal at the U.S. Court of Appeals for the Federal Circuit and counseled clients regarding Covered Business Method patent proceedings before the U.S. Patent Trial and Appeal Board.

He is also a registered patent attorney and has prepared and prosecuted patent applications before the U.S. Patent and Trademark Office across a variety of technologies including LED and retrofit devices, RFID devices, graphics processing systems, communication systems, integrated circuits, medical devices, and mechanical devices. William's practice also includes patent, trademark, and software licensing, trademark prosecution, and IP due diligence in corporate transactions.


  • Chicago-Kent College of Law, Illinois Institute of Technology, J.D., with honors, Certificate in Intellectual Property
  • University of Notre Dame, B.S., Electrical Engineering

Court Admissions

  • U.S. Court of Appeals, Federal Circuit
  • U.S. District Court for the Northern District of Illinois
  • U.S. District Court for the Eastern District of Texas

Bar Admissions

  • Illinois
  • United States Patent and Trademark Office


  • Named "Best Lawyer" in Litigation - Intellectual Property, The Best Lawyers in America, published by Woodward White, Inc. (2019-2020)
  • Named “Illinois Rising Star” in Intellectual Property Litigation by Thomson Reuters (2013-2014, 2017-2020)


  • Member, American Intellectual Property Law Association
  • Member, American Bar Association
  • Member, Illinois State Bar Association
  • Member, Intellectual Property Law Association of Chicago
  • Member, Associate Board, Lawyers for the Creative Arts