Patents by Inventor Moritaka Shoji

Moritaka Shoji 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).

  • Method of fabricating non-linear resistor
    Patent number: 5614138
    Abstract: A mixture of calcinated metallic oxides are mixed with ZnO and SiO.sub.2, granulated, compacted and then sintered to form a nonlinear resistor. After sintering, the formed ZnO resistor elements are heat treated, preferably in a two-step heat treating process.
    Type: Grant
    Filed: February 7, 1995
    Date of Patent: March 25, 1997
    Assignee: Hitachi Ltd.
    Inventors: Seiichi Yamada, Shigeru Tanaka, Moritaka Shoji, Shigehisa Motowaki, Ken Takahashi, Shingo Shirakawa, Shinichi Oowada, Takeo Yamazaki
  • Nonlinear voltage dependent resistor and method for manufacturing thereof
    Patent number: 4692735
    Abstract: A paste composed of Li.sub.2 CO.sub.3, SiO.sub.2, Sb.sub.2 O.sub.3 and Bi.sub.2 O.sub.3 is coated and baked on a side surface of a sintered ZnO based nonlinear voltage dependent resistor body to form a high resistance side surface for improving a impulse current withstand of the resistor.The amount of the paste constituent is 1.about.2.5 mol % for Li.sub.2 CO.sub.3, 72.+-.5 mol % for SiO.sub.2, 20.+-.3 mol % for Sb.sub.2 O.sub.3 and 8.+-.2 mol % for Bi.sub.2 O.sub.3.
    Type: Grant
    Filed: April 22, 1985
    Date of Patent: September 8, 1987
    Assignee: Hitachi, Ltd.
    Inventors: Moritaka Shoji, Takeo Yamazaki, Satoru Ogihara