Patents by Inventor Peter D. Grigas

Peter D. Grigas 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
    Patent number: 4726589
    Abstract: A compact golf course is divided into a plurality of sections by intersecting covered passageways which enable the golfer to transmit common fairways between greens and tees disposed around the perimeter of the course, with balls falling within the interior of the course being collected by the sections and transported to covered hitting areas accessible by the passageways.
    Type: Grant
    Filed: June 16, 1986
    Date of Patent: February 23, 1988
    Inventor: Peter D. Grigas