Patents by Inventor Elmer R. Fredericks

Elmer R. Fredericks 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 swing training device
    Patent number: 4953868
    Abstract: A swing training device usable by a golfer comprises an elongated lightweight shaft adapted to be swung by a golfer to produce either a desirable accelerated or insufficiently accelerated swing, corresponding respectively to a desirably or insufficiently accelerated swing of a golf club, relative to a golf ball; and sound producing structure associated with the shaft to produce a distinctive audible sound when the shaft is swung so as to define a desirably accelerated swing.
    Type: Grant
    Filed: November 24, 1989
    Date of Patent: September 4, 1990
    Inventors: Stanley C. Thompson, Elmer R. Fredericks