Patents by Inventor Makoto Ueda

Makoto Ueda 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).

  • Electronic timepiece
    Patent number: 4204397
    Abstract: An electronic timepiece reduces power consumption by normally driving the stepping motor with a short pulse and driving the motor with a wide pulse under heavy load conditions by sensing the rotor position. A detection circuit senses the voltage drop across a detection element in series with the motor coil for driving a first detection pulse and senses again for driving a second detection pulse. If the second voltage drop is larger, then the rotor is not rotating whereupon the wide pulse is used to drive the motor.
    Type: Grant
    Filed: April 20, 1978
    Date of Patent: May 27, 1980
    Assignee: Kabushiki Kaisha Daini Seikosha
    Inventors: Kazuhiro Asano, Makoto Ueda, Akira Torisawa, Masaharu Shida, Katsuhiko Satoh, Masaaki Mandai