Patents by Inventor Hirotoshi Koga

Hirotoshi Koga 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).

  • Selector valve
    Patent number: 5193581
    Abstract: A selector valve used for distributing and combining process flow.
    Type: Grant
    Filed: March 17, 1992
    Date of Patent: March 16, 1993
    Assignees: NKK Corporation, Chiyoda Corporation
    Inventors: Yoshimi Shiroto, Nobuhiro Onda, Yoshiharu Kataoka, Hirotoshi Koga, Akihiro Fujimori