Patents by Inventor Shuzi Ohtawa

Shuzi Ohtawa 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).

  • Patent number: 4702613
    Abstract: An electronic timepiece which indicates time with a plurality of hands driven by a plurality of motors respectively, has an electric source comprised of energy supplementary means such as solar batteries and accumulating means such as secondary batteries. At least one of the motors is stopped when the remaining energy of the accumulating means becomes lower than a predetermined value, and the timepiece is corrected and driven to indicate the present time by correcting the suspended time when the driving of the motor restarts. Thus, time thereby measurement can be conducted for a long time, restraining the consuming amount of electricity.
    Type: Grant
    Filed: March 4, 1986
    Date of Patent: October 27, 1987
    Assignee: Seiko Instruments & Electronics Ltd.
    Inventor: Shuzi Ohtawa