Patents by Inventor Robert W. Groff

Robert W. Groff 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).

  • Electron tube evacuating manifold system
    Patent number: 4746317
    Abstract: An electron tube evacuating system includes a manifold section having an evacuation chamber. A tube mounting section has a plurality of evacuation apertures in communication with the evacuation chamber. A plurality of tube mounting members individually hermetically mount tubes to be evacuated onto the mounting section. Each mounting member has an aperture in communication with the evacuation chamber.
    Type: Grant
    Filed: November 30, 1987
    Date of Patent: May 24, 1988
    Assignee: RCA Corporation
    Inventors: Donald B. Kaiser, Robert W. Groff