Patents by Inventor Robert L. Whitfield

Robert L. Whitfield 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).

  • Patent number: 4805922
    Abstract: A hollow, double-faced mallet-shaped putter is made from a plug and a cap into which the plug fits. A handle is inserted through the body of the cap. In one embodiment the cap may be fabricated from a pipe cap, the peripheral flange being removed and the exterior machined cylindrical, and a pipe cap threaded therein, the wrench grip of the plug being removed after insertion. Both ends of the putter are machined flat and perpendicular to the central axis of the club head.
    Type: Grant
    Filed: September 3, 1987
    Date of Patent: February 21, 1989
    Inventor: Robert L. Whitfield
  • Patent number: 4465281
    Abstract: A mat is provided for practicing golf club swings. The mat is made of longitudinally spaced apart blocks held in staggered rows by wires passing through the opposite ends of the blocks. Select blocks have a slit at one end so the select blocks are not held by the wire at one end and, thus, may be pivoted upward about the wire at the other end to serve as knockdown indicators.
    Type: Grant
    Filed: July 14, 1982
    Date of Patent: August 14, 1984
    Inventor: Robert L. Whitfield