Patents by Inventor Keizo Kikuchi

Keizo Kikuchi 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).

  • Apparatus for controlling operation of hydraulic machine
    Patent number: 4487549
    Abstract: An apparatus for controlling the operation of a hydraulic machine such as a multi-stage pump turbine having a plurality of runners mounted on a common shaft and guide vanes arranged around respective runners to adjust the flow rate of water supplied to respective runners.
    Type: Grant
    Filed: June 15, 1982
    Date of Patent: December 11, 1984
    Assignee: Hitachi, Ltd.
    Inventors: Tsunehiko Takakusagi, Keizo Kikuchi