Donald L. Dennison

Donald Dennison, Butzel Long Photo

Donald Dennison is Counsel at Butzel Long in the Washington, D.C. office.

Mr. Dennison received his B.S.M.E. from the Carnegie Institute of Technology in Pittsburgh, Pennsylvania and received his J.D. from George Washington University in Washington, DC.

Don’s practice is divided between trademark and patent prosecution and he has specialized in litigation before the Trademark Trial and Appeal Board. He also is retained to testify as an expert in patent matters related to patent prosecution and has testified as an expert witness in eighteen patent infringement, trade secret and trademark suits in the Federal and State courts, including New Jersey, New York, West Virginia, Pennsylvania, Iowa, Florida, Ohio and Illinois.

Don served as 1st Lieutenant in the United States Army Corps of Engineers in Germany from 1955-1957. He was also a patent examiner at the USPTO from 1957 -1960 where he examined patent applications in the mechanical fields of winding and reeling apparatus, hoisting and hauling equipment, railway mail delivery and horology.

Prior to joining Butzel Long, Don had his own intellectual property firm for many years.

Outside interests – Ham Radio, licensed instrument rated pilot, orchestral and band drummer, sports car racing and building. Soccer referee for over 35 years including professional and intercollegiate matches.


  • The Engineer School, Fort Belvoir, VA,
  • Carnegie Institute of Technology, B.S. Mechanical Engineering
  • George Washington University Law School, J.D.


  • District of Columbia
  • Maryland
  • Supreme Court of the United States
  • United States Court of Appeals for the District of Columbia
  • United States Court of Appeals for the Federal Circuit
  • United States Court of Appeals for the Fourth Circuit
  • United States Patent and Trademark Office
  • Virginia


International Association for the Protection of Industrial Property (AIPPI)

International Trademark Association (INTA)

European Communities Trademark Association (ECTA)


National Intercollegiate Soccer Officials Association (Life Member)

United States Soccer Federation (Life Member)

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