Patents by Inventor Takhiro Douke

Takhiro Douke 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).

  • Solenoid valve control circuit
    Patent number: 5008773
    Abstract: A solenoid valve control circuit for operatively connecting a battery to a solenoid to energize the solenoid to actuate a valve includes a coulomb controlling circuit for controllably supplying electric charge to the solenoid in accordance with predetermined criteria.
    Type: Grant
    Filed: November 21, 1988
    Date of Patent: April 16, 1991
    Assignee: Toto, Ltd.
    Inventors: Takao Yoshida, Toshio Ikeda, Takhiro Douke, Toshio Eki