Patents by Inventor Hidenori Sugio

Hidenori Sugio 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).

  • Frequency inverter
    Patent number: D358753
    Type: Grant
    Filed: July 21, 1994
    Date of Patent: May 30, 1995
    Assignee: Hitachi, Ltd.
    Inventors: Yoshiki Yoshida, Akitaka Takeuchi, Norinaga Suzuki, Hidenori Sugio