Patents by Inventor Donald H. MacPherson

Donald H. MacPherson 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).

  • Compound bow draw position indicating device
    Patent number: 4572153
    Abstract: A device is mounted to the sighting area of a compound bow for signaling when the bow drawstring has moved to a predetermined position. The device is hollow and serves to maintain the compound cables away from the line of travel of the bowstring. Electrical contacts are mounted within the hollow device and enable a signal when tripped by the movement of the cables.
    Type: Grant
    Filed: September 29, 1982
    Date of Patent: February 25, 1986
    Inventor: Donald H. MacPherson