Patents by Inventor Henricus G. A. Willems

Henricus G. A. Willems 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).

  • Glow discharge lamp
    Patent number: 4144472
    Abstract: A glow discharge lamp provided with two electrode wires, one end of each wire having a feedthrough connection extending through the lamp wall and the other end being embedded in the wall. By shaping the wires as U's and defining certain dimensional relationships, the so-called "hollow cathode" effect is obtained; so reducing the wall-blackening effect with age and enabling the discharge current (and hence the luminous flux) to be increased.
    Type: Grant
    Filed: June 1, 1978
    Date of Patent: March 13, 1979
    Assignee: U.S. Philips Corporation
    Inventors: Hermanus van Loon, Henricus G. A. Willems