Patents by Inventor Robert F. MacKeil

Robert F. MacKeil 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).

  • Golf club head with rearward center of gravity and diagonal orientation
    Patent number: 5354055
    Abstract: A "wood" type golf club head, of elongated and tapered shape, wherein the front profile and mass is diagonal to the ground and perpendicular to the shaft, thereby properly aligning the striking face to a normal ball striking pattern and moving the center of gravity rearward.
    Type: Grant
    Filed: October 27, 1992
    Date of Patent: October 11, 1994
    Inventor: Robert F. MacKeil
  • Fixed compensating loft golf club head
    Patent number: 5098103
    Abstract: The striking face of any golf club, except a putter, is to incorporate a face loft angle that is fixed, but varies from the toe to the heel and is more lofted toward the heel than at the toe.The purpose is to mitigate the error in ball trajectory that is caused when the ball is struck some distance from the center of gravity of the club head face.
    Type: Grant
    Filed: May 28, 1991
    Date of Patent: March 24, 1992
    Inventor: Robert F. MacKeil