Patents by Inventor Tomoichiro Ohta

Tomoichiro Ohta 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).

  • Power control device and image forming apparatus utilizing the same
    Patent number: 5942882
    Abstract: Disclosed is a power control device in which, to prevent noise generation when a load is driven by an AC power source, a reactor, the load, and a switching element are connected in series to the output of a rectifier, a diode element being connected in parallel to the reactor and the load, the switching element being driven at a frequency higher than that of the AC power source. Further disclosed is an image forming apparatus utilizing this power control device.
    Type: Grant
    Filed: May 7, 1997
    Date of Patent: August 24, 1999
    Assignee: Canon Kabushiki Kaisha
    Inventor: Tomoichiro Ohta