Patents by Inventor Akiko Naganuma

Akiko Naganuma 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).

  • Color image forming method and apparatus
    Patent number: 5184146
    Abstract: A color image forming method and apparatus for sequentially forming toner images of a plurality of colors on a photosensitive body so as to form a color toner image. The method and apparatus maintain a substantially constant developing bias so that a first exposure potential of a photosensitive surface and a second exposure potential of the photosensitive surface are substantially equal to one another.
    Type: Grant
    Filed: July 27, 1990
    Date of Patent: February 2, 1993
    Assignee: Konica Corporation
    Inventors: Kazuyoshi Tanaka, Toshifumi Isobe, Masahiko Itaya, Akiko Naganuma