Patents by Inventor Randolph K. Friesen

Randolph K. Friesen 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).

  • Truck box cover
    Patent number: 5011214
    Abstract: A cover for a truck box consists of three side by side panel sections hinged together to pivot between a closed position extending across the top of the truck box and an open position arranged face to face and generally vertically along the side of the box. Movement of the panel segments is controlled by a linkage mounted on the underside of the panel segments. The linkage may be driven by an actuator.
    Type: Grant
    Filed: June 25, 1990
    Date of Patent: April 30, 1991
    Inventors: Randolph K. Friesen, J. David A. Wight