Patents by Inventor Donald C. Douglass

Donald C. Douglass 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).

  • Backpack
    Patent number: 4420103
    Abstract: A backpack with integral frame formed of plastic sheets without metal supports. A load carrying sack having a front face, a pair of shoulder straps and a waistband, and a support pad mounted on the front face, the pad comprising a foam sheet of a first height, a stiffener sheet of a second height less than said first height, and a protective sheet, with the three sheets attached to the front face by stitching forming vertical panels and upper and lower horizontally pivoting structures with a stiff intermediate structure.
    Type: Grant
    Filed: September 7, 1982
    Date of Patent: December 13, 1983
    Assignee: Wilderness Group Inc.
    Inventor: Donald C. Douglass