Patents by Inventor John D. Leonard

John D. Leonard 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).

  • Ball striking club
    Patent number: D341642
    Type: Grant
    Filed: February 10, 1992
    Date of Patent: November 23, 1993
    Assignee: Lawn Golf of Vermont
    Inventors: Maurice A. Brown, John D. Leonard, Robert E. Johnson, Richard O. Raymond