Patents by Inventor Toshiya Yamamoto

Toshiya Yamamoto 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).

  • Cathode-ray tubes and coating materials therefor
    Patent number: 4760310
    Abstract: A cathode-ray tube is coated on the inner surface with a coating material which contains, in a weight ratio based on solid, 10 to 22% of graphite, 30 to 50% of a metal oxide, 2 to 9% of a surface treating agent and 25 to 42% of water glass, and in which at least 18% of graphite powders in its simplest form suspended in said coating material have a particle size of at least 1 micron.
    Type: Grant
    Filed: January 21, 1986
    Date of Patent: July 26, 1988
    Assignees: Hitachi Powdered Metals Co., Ltd., Hitachi, Ltd.
    Inventors: Sadao Deyama, Toshiya Yamamoto, Koichi Sakai, Shigemi Hirasawa, Tadao Kubo, Yoshifumi Tomita