Patents by Inventor Takazo Hirano

Takazo Hirano 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).

  • Water level control system for a reservoir
    Patent number: 4332507
    Abstract: A water level control system for a reservoir includes steps of detecting water level, outflow rate and inflow rate of the reservoir detecting modified water level corresponding to the reservoir's content depending on the actual water level, the outflow rate and the inflow rate, and controlling the outflow rate of the reservoir in response to a deviation value between a set reference and the modified water level, thereby reducing the influence of undesirable water level fluctuation.
    Type: Grant
    Filed: November 28, 1979
    Date of Patent: June 1, 1982
    Assignee: Hitachi, Ltd.
    Inventors: Fumio Wakamori, Motohisa Funabashi, Mamoru Kata, Takazo Hirano, Mikihiko Onari