Patents by Inventor Atsuhi Hisazumi

Atsuhi Hisazumi 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).

  • Patent number: 4254488
    Abstract: Sixty strip-like phosphor display elements are formed on an insulated substrate to extend radially from its center at equiangular intervals, and inner and outer grids are disposed substantially concentrically with the radially extending phosphor display elements in opposing relation thereto. A thermo-electron emissive heater is disposed in opposing relation to the inner and outer grids on the opposite side from the phosphor display elements. A drive-display circuit provides, on a time-shared basis, a short hand display by selecting one of the phosphor display elements corresponding to an hours signal and applying a voltage to the inner grid alone, and provides a long hand display by selecting one of the phosphor display elements corresponding to a minutes signal and applying voltages to both the inner and outer grids.
    Type: Grant
    Filed: September 24, 1979
    Date of Patent: March 3, 1981
    Assignee: Hoshidenki-Seizo Kabushiki Kaisha
    Inventors: Shin Ojima, Kazuhiko Ohgami, Atsuhi Hisazumi