Practice Areas



  • General Motors Corporation, Chairman’s Honors, 2000, 2005 and 2008
  • General Motors Corporation, General Counsel Award, 2008


  • U.S. Patent and Trademark Office, 1988
  • State of Michigan, 1987


University of Detroit Law School, J.D., 1987

Michigan Technological University, M.S., Business Administration, 1983

Michigan Technological University, B.S., Mechanical Engineering, 1982

Photo of Karl F. Barr

Karl F. Barr

Partner in Charge of the Detroit Office
248.524.2300, ext. 3124

Prior to joining Cantor Colburn, Karl Barr was Intellectual Property Counsel at General Motors Corporation. He has hands-on experience with multinational intellectual property issues and continues to focus his practice on patent preparation, prosecution, complex intellectual property transactions, business counseling, monetization, licensing and sale as well as advanced development, assessment and acquisition of new technologies, and technology property rights.

Experience Highlights

Partner, Cantor Colburn, 2008-present

IP Counsel, General Motors Corporation, 1989-2008

  • Global IP Counsel, General Motors Powertrain, 1989-1998 and 2004-2008
  • Global IP Counsel, General Motors Fuel Cell Activity, 1998-2004
  • IP Counsel, Delphi Division of General Motors, 1989-1998

Associate, Basile, Weintraub and Hanlon, Troy, MI, 1987-1989

Mechanical Engineer, Harley, Ellington, Pierce, Yee, Detroit, MI, 1983-1985



Professional Affiliations

Intellectual Property Owners Association