Skip to main content

John McMahon

Of Counsel

John McMahon

University of Missouri
at Kansas City

School of Law

University of Kansas
BA Math & Chemistry
BS Chemical Engineering

University of Missouri
at Kansas City



  • vcf icon

Required fields are denoted with an asterisk.

*** Please Note – By receiving your inquiry above we are not agreeing to represent you. We request execution of formal terms of engagement before entering into an attorney-client relationship. Therefore, please do not send any confidential information with this communication.

Mr. McMahon worked as a chemical engineer for Proctor and Gamble for seven years, prior to entering patent law practice. In 1976, while in law school, he joined the law firm of Fishburn, Gold and Litman, which was established in 1843.  He became managing partner of the firm in 1982. In 2000, he formed a separate firm. Mr. McMahon’s practice is mainly in the preparation and prosecution of patents and trademarks, but also is involved in other intellectual property matters.


  • Kansas City Metropolitan and American Bar Associations
  • The Missouri Bar Association
  • Kansas Bar Association
  • American Institute of Chemical Engineers
  • American Chemical Society

Bar Admissions

  • Missouri State Bar, 1978
  • Kansas State Bar,
  • U.S. Patent and Trademark Office, 1979