Patents by Inventor Keith L. Blankenship

Keith L. Blankenship 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).

  • Patent number: 5898111
    Abstract: A lift box and system simulates the lifting of a crate or box having cutout handles disposed therein. The lift box includes the normal hand hole cutouts, a structural frame adapted to hold a variable amount of disc-type weights and an outer shell which covers the frame and creates an inside cavity which contains the weights. A top surface of each hand hole cutout (the handle) is formed from a separate piece which is isolated from the shell and coupled to the frame through load cells. That arrangement prevents the user from applying any lifting force to the side walls of the lift box, which would reduce the overall force recognized by the load cells.
    Type: Grant
    Filed: June 24, 1997
    Date of Patent: April 27, 1999
    Assignee: The Blankenship Corporation
    Inventors: Keith L. Blankenship, Earl Van Wagoner
  • Patent number: D412788
    Type: Grant
    Filed: June 25, 1996
    Date of Patent: August 17, 1999
    Assignee: Blankenship Corporation
    Inventors: Earl Van Wagoner, Keith L. Blankenship