Patents by Inventor Hiroyuki Simizu

Hiroyuki Simizu 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).

  • Method and apparatus of driving stepping motor
    Patent number: 5905353
    Abstract: A method of driving a stepping motor comprises providing a chopping signal to a drive current of the stepping motor when a chopping condition is on, and synchronizing output of the chopping signal with output of a drive signal for driving stepwise the stepping motor.
    Type: Grant
    Filed: September 11, 1996
    Date of Patent: May 18, 1999
    Assignee: Unisia Jecs Corporation
    Inventors: Michiya Hiramoto, Hiroyuki Simizu