Patents by Inventor Taketoshi Yokoyama

Taketoshi Yokoyama 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).

  • Metal drum and image holding member using the same
    Patent number: 4621919
    Abstract: An image holding member for electrophotography has a metal drum, one side face of which is formed integrally with the peripheral face of the drum. And the image holding member has at the center of said side face a rotatory drum supporting shaft formed integrally with said side face.
    Type: Grant
    Filed: July 13, 1983
    Date of Patent: November 11, 1986
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hiroshi Nitanda, Morikazu Mizutani, Taketoshi Yokoyama, Jun Tamai, Toru Okumura