Patents by Inventor Helmut Kimmel

Helmut Kimmel 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-gun system
    Patent number: 4942334
    Abstract: In a cathode-ray tube with a thick grid No. 2 (24) in the electron-gun system, current transfer into grid No. 2 (24) may result in a lack of picture sharpness. To avoid this error, the aperture (4) in grid No. 2 (24) has a widening (6) of conical shape or stepped diameter.
    Type: Grant
    Filed: May 31, 1988
    Date of Patent: July 17, 1990
    Assignee: Nokia Graetz
    Inventors: Helmut Kimmel, Hans Reule