Patents by Inventor John Roger Hart

John Roger Hart 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).

  • Apparatus and method for controlling currents in an inductor
    Patent number: 5650705
    Abstract: A motor control system (10) for controlling a multiple number of motors, each motor having a multiple number of phases. System (10) can be used to dynamically vary the step sizes from microsteps to full steps (i.e. "syncro-stepping the motor").
    Type: Grant
    Filed: February 13, 1995
    Date of Patent: July 22, 1997
    Inventor: John Roger Hart