Patents by Inventor Duncan S. MacGregor

Duncan S. MacGregor 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: 5865686
    Abstract: A method and device for golf swing training involving an elongated flexible member having grip at its proximal end, and a symmetrical weight at its distal end.A cap covers and is attached to the exterior surface of the weight. The cap has structure on its outer surface for retarding the flow of air around the weight,whereby the means for retarding air flow creates resistance to swinging of the device, and the user experiences a feel comparable to swinging a golf club.
    Type: Grant
    Filed: December 17, 1996
    Date of Patent: February 2, 1999
    Inventor: Duncan S. MacGregor