Patents by Inventor Yutaka Okayama

Yutaka Okayama 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).

  • Developing device for copying machine
    Patent number: D308885
    Type: Grant
    Filed: December 2, 1988
    Date of Patent: June 26, 1990
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yutaka Okayama, Takeshi Komada
  • Developing device for copying machine
    Patent number: D310539
    Type: Grant
    Filed: July 19, 1988
    Date of Patent: September 11, 1990
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takeshi Komada, Yutaka Okayama
  • Developing device for copying machine
    Patent number: D314212
    Type: Grant
    Filed: July 19, 1988
    Date of Patent: January 29, 1991
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takeshi Komada, Yutaka Okayama
  • Copying machine
    Patent number: D320041
    Type: Grant
    Filed: July 18, 1988
    Date of Patent: September 17, 1991
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takeishi Komada, Tomohiko Hirata, Minoru Aoyama, Yutaka Okayama