Patents by Inventor Koichi Katoh

Koichi Katoh 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 processing apparatus for selectively altering image colors
    Patent number: 4873570
    Abstract: A color image processing apparatus such as a color copying machine has a color appointing device for enabling an operator to appoint any desired color involved in an original image, a color range changing device for manually or automatically changing the size of range of the colors which can be regarded as being the same as the predetermined color, a target color appointing device for appointing a color to which the predetermined color is to be converted, and a color image forming device such as a laser beam printer for forming a color image with the predetermined color and colors in the color range converted into the target color.
    Type: Grant
    Filed: November 13, 1987
    Date of Patent: October 10, 1989
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yasumichi Suzuki, Yoshinori Ikeda, Koichi Katoh, Tetsuya Ohnishi, Toshihiro Kadowaki, Toshio Honma