Patents by Inventor Toshiya Hatta

Toshiya Hatta 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).

  • Protective resistance element for a semiconductor device
    Patent number: 6191454
    Abstract: A semiconductor device includes a transistor and a protective resistance element. The transistor has first and second impurity regions of a first conductivity type formed on a surface of a substrate and serving as a source and a drain, respectively, and a gate electrode formed on a channel region sandwiched between the first and second impurity regions through a gate insulating film. The protective resistance element has a third impurity region of the first conductivity type formed on the surface of the substrate to be separated from the second impurity region by a predetermined distance, a control electrode formed on the substrate through an insulating film in a surface region sandwiched between the second and third impurity regions, and a well of the first conductivity type formed on the surface of the substrate in the surface region sandwiched between the second and third impurity regions to come into contact with them.
    Type: Grant
    Filed: December 10, 1997
    Date of Patent: February 20, 2001
    Assignee: NEC Corporation
    Inventors: Morihisa Hirata, Kouji Terai, Toshiya Hatta
  • Conductive resin composition containing zinc oxide whiskers having a tetrapod structure
    Patent number: 5183594
    Abstract: A conductive composition containing at least zinc oxide whiskers. The conductive composition can be used to provide a conductive resing composition and a conductive coating composition, which have various uses, particularly in conductive layers, conductive supports or protective layers of electrophotographic photosensitive members.
    Type: Grant
    Filed: August 28, 1989
    Date of Patent: February 2, 1993
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Minoru Yoshinaka, Eizo Asakura, Mitsumasa Oku, Motoi Kitano, Yoshio Nakatani, Hideyuki Yoshida, Toshiya Hatta, Seiichi Nakatani
  • Electrophotographic photosensitive member containing a conductive layer which comprises a resin and a conductive zinc oxide having a tetrapad structure
    Patent number: 5171480
    Abstract: A conductive composition containing at least zinc oxide whiskers having a tetrapod structure. The conductive composition can be used to provide a conductive resin composition and a conductive coating composition, which have various uses, particularly in conductive layers, conductive supports or protective layers of electrophotographic photosensitive members.
    Type: Grant
    Filed: October 30, 1991
    Date of Patent: December 15, 1992
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Minoru Yoshinaka, Eizo Asakura, Mitsumasa Oku, Motoi Kitano, Yoshio Nakatani, Hideyuki Yoshida, Toshiya Hatta, Seiichi Nakatani