Patents by Inventor Yoshimasa Nishihara

Yoshimasa Nishihara 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).

  • Two component developer comprising specific magnetic toner and specific magnetic carrier
    Patent number: 6183925
    Abstract: This invention provides a two-component developer comprising magnetic carrier particles and toner particles which contain magnetic particles at a specified content, being excellent in high speed copying system.
    Type: Grant
    Filed: September 30, 1996
    Date of Patent: February 6, 2001
    Assignee: Minolta Co., Ltd.
    Inventors: Toshitaro Kohri, Akihiro Nakamura, Yoshimasa Nishihara
  • Two-component developer comprising specific magnetic toner and specific magnetic carrier
    Patent number: 5663027
    Abstract: This invention provides a two-component developer comprising magnetic carrier particles and toner particles which contain magnetic particles at a specified content, being excellent in high speed copying system.
    Type: Grant
    Filed: October 18, 1994
    Date of Patent: September 2, 1997
    Assignee: Minolta Camera Kabushiki Kaisha
    Inventors: Toshitaro Kohri, Akihiro Nakamura, Yoshimasa Nishihara