Patents by Inventor Ichiro Tsubokawa

Ichiro Tsubokawa 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).

  • Thermistor composition
    Patent number: 4347166
    Abstract: A thermistor composition comprises oxide powder of at least two of Mn, Co, and Ni, and an oxide powder of Ru as a noble metal.
    Type: Grant
    Filed: February 22, 1979
    Date of Patent: August 31, 1982
    Assignee: Hitachi, Ltd.
    Inventors: Hiromi Tosaki, Hideo Arima, Teruo Mozume, Akira Ikegami, Tokio Isogai, Ichiro Tsubokawa
  • Thermistor composition and thick film thermistor
    Patent number: 4160227
    Abstract: This specification discloses a thermistor composition comprising a thermistor characteristic powder, a bismuth containing borosilicate glass frit and an electrically conductive powder comprising a mixture of a noble metal powder and ruthenium oxide powder which is selected from RuO.sub.2 + Ag and RuO.sub.2 + Au wherein the mixing ratio of the metal oxide thermistor characteristic powder, the glass and the electrically conductive powder is in the area of the quadrilateral ABCD in the triangular diagram of the accompanying FIG.
    Type: Grant
    Filed: March 18, 1977
    Date of Patent: July 3, 1979
    Assignee: Hitachi, Ltd.
    Inventors: Akira Ikegami, Hiromi Tosaki, Jun Yamada, Teruo Mozume, Ichiro Tsubokawa, Kiyoshi Sakashita