Patents by Inventor Frank J. Duggan

Frank J. Duggan has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Squash racket
    Patent number: D272553
    Type: Grant
    Filed: September 23, 1981
    Date of Patent: February 7, 1984
    Assignee: AMF Incorporated
    Inventors: Harleston J. Hall, Jr., Drew J. Yuhas, Frank J. Duggan, Thomas Johnson
  • Game ball racket
    Patent number: D274741
    Type: Grant
    Filed: January 6, 1982
    Date of Patent: July 17, 1984
    Assignee: AMF Incorporated
    Inventors: Harleston J. Hall, Jr., Drew J. Yuhas, Frank J. Duggan, Thomas Johnson, Paul A. Witte