Patents by Inventor Toshiaki Narisawa

Toshiaki Narisawa 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).

  • Inorganically insulated heater, and cathode ray tube and air flow sensor using the same
    Patent number: 5138221
    Abstract: The present invention relates to an inorganically insulated heater having a long life for use in air flow sensors, cathode ray tube cathode heaters etc., wherein the distribution of inorganic insulating particles of the whole insulating layer is made uniform and thereby the development of cracks and the like in the insulating layer is reduced and breaking of wire and dielectric breakdown occur with difficulty even at high temperatures and under strong vibrations.
    Type: Grant
    Filed: June 28, 1990
    Date of Patent: August 11, 1992
    Assignee: Hitachi, Ltd.
    Inventors: Toshiaki Arato, Toshiaki Narisawa, Masahisa Sobue, Nobuyuki Koganezawa