Patents by Inventor Naoki Shutoh

Naoki Shutoh 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).

  • Power circuit breaker and power resistor
    Patent number: 5254816
    Abstract: According to this invention, there is disclosed a compact power circuit breaker having a large breaking capacity and stable breaking performance due to a compact closing resistor unit having high performance. The power circuit breaker includes a main switching mechanism having an arc extinguishing function, an auxiliary switching mechanism parallelly connected to the main switching mechanism and having an arc extinguishing function, and a closing resistor unit connected in series with the auxiliary switching mechanism and incorporated with a resistor containing zinc oxide (ZnO) as a main component and titanium figured out as titanium oxide (TiO.sub.2) in an amount of 0.5 to 25 mol% and nickel figured out as nickel oxide (NiO) in an amount of 0.5 to 30 mol. % as sub-components.
    Type: Grant
    Filed: March 30, 1992
    Date of Patent: October 19, 1993
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Naoki Shutoh, Motomasa Imai, Fumio Ueno, Hideyasu Andoh, Shoji Kozuka, Hiroshi Endo, Iwao Mitsuishi
  • Light-shielding a delta n sintered body and method of manufacturing the same
    Patent number: 5126293
    Abstract: A light-shielding aluminum nitride sintered body essentially consists of aluminum nitride crystal grains and 0.01 to 1.5 wt % (an element content in the case of a transition metal compound) of homogeneously dispersed transition metal particles and/or transition metal compound particles having an average particle size of 5 .mu.m or less and has a thermal conductivity of 200 W/m.K or more.
    Type: Grant
    Filed: November 29, 1990
    Date of Patent: June 30, 1992
    Assignee: Kabushiki Kaisha Koshiba
    Inventors: Mitsuo Kasori, Akihiro Horiguchi, Fumio Ueno, Yoshiko Goto, Naoki Shutoh