Patents by Inventor Robert S. Krangle

Robert S. Krangle 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 course range finder system
    Patent number: 5046839
    Abstract: A hand-held electro/optical range finder, sends discrete pulses of coherent light to a retroreflector which is mounted on a golf course pin. The time period required for the light pulses to traverse the distance between the golfer and the pin is converted into a distance measurement which is displayed to the golfer.
    Type: Grant
    Filed: July 30, 1990
    Date of Patent: September 10, 1991
    Assignee: Locker Enterprises, Inc.
    Inventor: Robert S. Krangle