Patents by Inventor Yamakawa Koji

Yamakawa Koji 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).

  • Ink cartridge for printer
    Patent number: D348480
    Type: Grant
    Filed: December 23, 1992
    Date of Patent: July 5, 1994
    Assignee: Canon Kabushiki Kaisha
    Inventors: Toshihiko Ujita, Kenjiro Watanabe, Yasuo Kotaki, Kazuhiro Nakazima, Yamakawa Koji, Torachika Osada, Hidemi Kubota, Yohei Sato, Keiichiro Tsukuda, Masanori Takenouchi, Kayomi Sato