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William P. Oberhardt


  • DePaul University (J.D.)
  • University of Notre Dame (B.S.E. with honors, Mechanical Engineering)


  • State of Illinois
  • U.S. Patent and Trademark Office
  • U.S. Court of Appeals, Federal Circuit
  • U.S. Court of Appeals, Seventh Circuit
  • U.S. District Court, Northern District of Illinois (Trial Bar)


  • American Bar Association
  • Chicago Bar Association
  • Intellectual Property Law Association of Chicago
  • American Intellectual Property Law Association
  • Federal Circuit Bar Association

Mr. Oberhardt has over 30 years of trial and appellate experience in the federal and state courts in Chicago and throughout the United States. He practices in the areas of patents, trademarks, unfair competition, and trade secrets. Mr. Oberhardt has handled a wide variety of intellectual property related cases, and is experienced in all aspects of litigation. He also regularly serves as local counsel in Chicago for various non-Chicago based patent firms.

Mr. Oberhardt is experienced in obtaining and protecting intellectual property for a diverse array of technologies, including printing press systems, aerospace components, medical equipment, hydraulic and pneumatic components, plastics, catalysts, muffler systems, pharmaceuticals, radar equipment, automotive equipment, aircraft brake systems, food manufacturing systems, sporting goods, toys, runway friction calculation technology, power tools, wire rope, marine equipment, and retail anti-theft and display systems. He represents companies that vary in size from the largest multinational companies to individual entrepreneurs.

Mr. Oberhardt counsels clients in the cost-effective acquisition, preservation, enforcement, and licensing of proprietary intellectual property rights. He also provides written opinions to clients concerning the enforceability or non-enforceability of proprietary rights prior to client involvement in entering new competitive arenas.

Mr. Oberhardt has a bachelor's degree in mechanical engineering with honors from the University of Notre Dame, and a law degree from DePaul University. He is admitted to practice in Illinois, and is a member of the Trial Bar of the U.S. District Court for the Northern District of Illinois. He also is admitted to the bars of the U.S. Circuit Court of Appeals for the Federal Circuit and the U.S. Circuit Court of Appeals for the Seventh Circuit. Mr. Oberhardt is registered to practice in the United States Patent and Trademark Office.

Mr. Oberhardt's professional memberships include the American Bar Association, the American Intellectual Property Law Association, the Chicago Bar Association, the Intellectual Property Law Association of Chicago, and the Federal Circuit Bar Association. He is designated as an Illinois Leading Lawyer in intellectual property law by the Illinois Leading Lawyers Network, Law Bulletin Publishing Company.