Patents by Inventor Gary E. Gresham

Gary E. Gresham 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).

  • Electronic shifter
    Patent number: 5068583
    Abstract: A shifter (10) comprises control electronics (20) which eliminate mechanical switches, providing increased reliability. The shift mechanics include a double-spring (28,30) disposed between a spring guide (32). The springs are compressed responsive to a driving screw (36) under control of a bidirectional motor (12). The motor (12) is controlled by the control electronics (20).
    Type: Grant
    Filed: August 15, 1990
    Date of Patent: November 26, 1991
    Assignee: Transportation Technologies, Inc.
    Inventors: Gary E. Gresham, Burnis H. Tucker