Patents by Inventor Frank Sparkman

Frank Sparkman 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).

  • Pin guard bow sight
    Patent number: 4999919
    Abstract: An archer's bow pin sight device having a combination of vertical bands and horizontal bands in conjunction with typical sight pins commonly used on bows, so as to provide bracketing lines on either side of sight pins and target or bracketing lines above and below the pin and target or both side and top and bottom.
    Type: Grant
    Filed: July 13, 1990
    Date of Patent: March 19, 1991
    Inventor: Frank Sparkman