Patents by Inventor Gijsbert Johannes Ponsen

Gijsbert Johannes Ponsen 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).

  • Gaseous electric discharge tube having a coaxial, hollow cathode structure
    Patent number: 3934167
    Abstract: In an electric discharge tube, for example, for an argon ion laser, the cathode is formed by a double-walled tube of tantalum or tungsten, the inner tube of which is the shorter. Under the influence of the discharge in the order of 100 A, said inner tube starts glowing. An auxiliary anode may be present near the end of the cathode.
    Type: Grant
    Filed: October 1, 1974
    Date of Patent: January 20, 1976
    Assignee: U.S. Philips Corporation
    Inventors: Gijsbert Johannes Ponsen, Wilhelmus Jacobus Witteman