Patents by Inventor John E. Carmack

John E. Carmack 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).

  • Pick-up truck
    Patent number: 4139236
    Abstract: Pick-up truck comprising a rectangular frame for hinged support at the rear of the frame of the truck, a further rectangular frame in slideable engagement with the hingedly-supported frame and having a truck bed mounted thereon, a pair of spaced hydraulic rams for tilting the first rectangular frame, another hydraulic ram for sliding the further frame and bed with respect to the first rectangular frame, and suitable hydraulic power control for selectively operating the rams.
    Type: Grant
    Filed: April 15, 1977
    Date of Patent: February 13, 1979
    Inventors: C. Lee Hill, John E. Carmack