Patents by Inventor Donald R. Crissman

Donald R. Crissman 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 bed insert having power unloading blade
    Patent number: 5273390
    Abstract: A truck bed insert having a powered unloading blade, the insert adapted to be carried on a truck bed, the insert comprising a floor, a tunnel member, upwardly extending sides joined to said floor sides, the front end comprising a blade upwardly extending from said floor and disposed between said upwardly extending sides. A worm screw drive shaft is mounted in said tunnel member. Power is provided for turning said worm drive.
    Type: Grant
    Filed: October 13, 1992
    Date of Patent: December 28, 1993
    Inventor: Donald R. Crissman