Patents by Inventor Kazuhiko Mizuno

Kazuhiko Mizuno 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).

  • Electrophotographic toner with magnetic particle additive
    Patent number: 5641601
    Abstract: An electrophotographic toner suitable for use in an image-forming apparatus employing an organic photoconductor is disclosed which comprises toner particles and, adherent to the surface thereof, magnetic particles having an FeO content of 17% by weight or lower, a specific surface area of from 2.5 to 6 m.sup.2 /g, and an octahedral or hexahedral particle shape. The toner functions to prevent toner components and paper dust from adhering to the surface of an organic photoconductor, and has satisfactory moisture resistance.
    Type: Grant
    Filed: April 12, 1996
    Date of Patent: June 24, 1997
    Assignee: Tomoegawa Paper Co., Ltd.
    Inventors: Shuji Mitani, Kazuhiro Sato, Kazuhiko Mizuno, Yoshiyuki Hasegawa
  • Misconvergence measuring apparatus
    Patent number: 4988857
    Abstract: This invention is concerned with apparatus for automatically measuring misconvergence in the production of color Braun tubes or color display apparatus using color Braun tubes.
    Type: Grant
    Filed: May 4, 1989
    Date of Patent: January 29, 1991
    Assignee: Hitachi, Ltd.
    Inventors: Takumi Karasawa, Michio Tsukii, Takashi Atobe, Takaaki Ishikawa, Kazuhiko Mizuno