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William M. Wesley


Bill Wesley has more than thirty years experience in the field and is internationally known for litigation and licensing in complex technical cases. Bill has conducted numerous bench and jury trials in complex litigation both in the United States and abroad, including patent, trade secret and international trade proceedings.  He has also conducted a wide variety of inter partes proceedings before the U.S. and European Patent Offices, including interferences, appeals, protests, reexaminations, public use proceedings and third party observations and opposition.  Bill's appellate experience includes various Circuit Courts of Appeal as well as the Court of Appeals for the Federal Circuit, the United States Supreme Court, and the Board of Patent Interferences and Appeals of the Patent Office.  

The subject matter of the cases Bill has handled has included, among other things, digital computers and related hardware and software, including all forms of memories, memory arrays, removable drives, power management, battery chemistry, displays, artificial intelligence, I/O devices, etc,; analog and digital communications, including satellite networks, antenna technology, modems, air to ground links, etc.; electrical connectors, telephony, Internet architecture and use for various applications; HVAC, electric motors and motor controls, consumer appliances; aircraft wheel and brakes, engines, instrument landing systems, inertial guidance, autopilots, etc.; hearing aids and testing equipment; food chemistry and processing, plant chemistry and husbandry; medical imaging and related diagnostic equipment, medical diagnostic and therapeutic arrays and testing equipment, molecular biology, DNA testing; bar code and RFID equipment; and road and rail transportation systems, grade crossings and safety devices.

Bill has lectured on a variety of topics before the ABA, the International Trade Commission and numerous other professional bodies and was instrumental in the use and development of arbitration for Patent Office interference proceedings.  He has been lead counsel for Fortune 500 companies in both arbitration and mediation proceedings on numerous occasions.  He also has an extensive licensing practice, and is certified as a Licensing Professional by CLP Inc.

Related Experience

  • Electrical engineer at Texas Instruments 
  • Electrical engineer at Motorola

Professional & Community Involvement

  • Member, Licensing Executives Society
  • Member, International Trade Commission Trial Lawyers Association
  • Member, Association of University Technology Managers
  • Hearing Officer, Illinois State Pollution Control Board

Honors & Awards

  • “Guide to the World’s Leading Patent Law Experts,” Euromoney Magazine
  • Who's Who Among American Lawyers
  • Leading Lawyers Network
  • Illinois Super Lawyers

Areas of Practice


Bar Admissions / Registrations

  • Illinois
  • U.S. District Court for the Northern District of Illinois
  • U.S. Court of Appeals for the Seventh Circuit
  • U.S. Court of Appeals for the Federal Circuit
  • U.S. Supreme Court
  • U.S. Patent and Trademark Office


  • Loyola University, J.D., cum laude, American Jurisprudence Awards
  • Marquette University, B.E.E., Tau Beta Pi, Eta Kappa Nu, Alpha Sigma Nu