Patents by Inventor Gregory L. Harper

Gregory L. Harper 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).

  • Security trailer hitch ball
    Patent number: D342472
    Type: Grant
    Filed: October 7, 1992
    Date of Patent: December 21, 1993
    Inventor: Gregory L. Harper