Patents by Inventor Yoji Kohno

Yoji Kohno 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).

  • Flat CRT having a carbon layer on an inner surface of a back panel
    Patent number: 5656885
    Abstract: The present invention is directed to a transmission type flat cathode ray tube in which a flat glass tube envelope (15) is formed of a triple structure having a screen panel (11), a back panel (12) and a funnel portion (14) having a neck portion (13). A carbon film (24) to which an anode voltage is applied is formed on the inner surface of the back panel 12 in an opposing relation to a phosphor screen (19) of the screen panel (11). Thus, the occurrence of a pseudo signal in the transmission type flat cathode ray tube can be avoided.
    Type: Grant
    Filed: January 29, 1993
    Date of Patent: August 12, 1997
    Assignee: Sony Corporation
    Inventors: Yoji Kohno, Ichiro Utsumi