Patents by Inventor Itsuo Matsusaki

Itsuo Matsusaki 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).

  • Multi-digit luminescence display tube having means for supplying a positive or zero voltage to a selected grid to suppress luminescence of anode segments covered thereby
    Patent number: 3958150
    Abstract: A multi-digit luminescence display tube comprises an anode assembly including a plurality of luminescent anode segments for each digit, a cathode, a plurality of grids disposed between the cathode and the anode segments of the respective digits, structure for supplying first voltages to the grids and to at least a selected one of the anode segments to make the same luminesce, and apparatus for superposing a second voltage on the first voltage supplied to at least a selected one of the grids to suppress luminescence at the anode segments covered thereby. The cathode comprises a common filament for the anode segments of all digits. Structure is provided for rendering the second voltage non-negative without adversely affecting the brightness of the selected anode segment which are not covered by the selected grid.
    Type: Grant
    Filed: July 30, 1974
    Date of Patent: May 18, 1976
    Assignee: Nippon Electric Kagoshima, Ltd.
    Inventors: Masaki Kobayakawa, Kazufumi Yawata, Hideo Murayama, Itsuo Matsusaki