Patents by Inventor Nobuharu Takada

Nobuharu Takada 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).

  • Overheat preventing system of A.C. motor
    Patent number: 4977363
    Abstract: In the operation of an A.C. motor by switching the number of poles of the motor or the power sources of different frequencies, switching operating circuit is constructed to automatically switch so that the motor does not overheat by the above-described switching. Thus, the energy of the power sources can be saved.
    Type: Grant
    Filed: March 16, 1990
    Date of Patent: December 11, 1990
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Nobuharu Takada, Toshihiko Hirosaki