Patents by Inventor Reinhard Ziegler

Reinhard Ziegler 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).

  • Dispenser cathode for a grid-controlled electron tube and method of manufacturing same
    Patent number: 4031425
    Abstract: A dispenser cathode for a grid-controlled electron tube in which the emission of surface regions immediately opposite the control grid is reduced by providing projections above the emissive surface of fused, pore-closing portons which have a focussing effect. These projections may be formed by electron beam or laser beam welding.
    Type: Grant
    Filed: October 2, 1975
    Date of Patent: June 21, 1977
    Assignee: U.S. Philips Corporation
    Inventors: Reinhard Ziegler, Horst Seifert