Patents by Inventor Leo C. Davis

Leo C. Davis 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).

  • Bowling training device
    Patent number: 4132407
    Abstract: A hinged frame, having attachment straps for mounting the frame on the inside of a user's elbow, and a drop lock which permits an initial bending of a user's arm then locks the arm straight on the user straightening his arm for bowling ball delivery.
    Type: Grant
    Filed: December 17, 1976
    Date of Patent: January 2, 1979
    Inventor: Leo C. Davis