Patents by Inventor Donald Henry Spawn

Donald Henry Spawn 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).

  • Rotating hinge pin for spring loaded gear box
    Patent number: 3995509
    Abstract: A turret assembly is disclosed which is journaled in a bull ring and driven by a drive box which is mounted on a hinge pivot shaft and which shaft is rotated in response to rotation of the turret with respect to the bull ring.
    Type: Grant
    Filed: November 7, 1975
    Date of Patent: December 7, 1976
    Assignee: General Electric Company
    Inventors: Lester Frank Backus, Donald Henry Spawn