Patents by Inventor Keith R. Grammer

Keith R. Grammer 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).

  • Gas main valve wrench
    Patent number: D248613
    Type: Grant
    Filed: March 17, 1977
    Date of Patent: July 25, 1978
    Inventors: Thomas Pace, Keith R. Grammer