Patents by Inventor Masaaki Ogata

Masaaki Ogata 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).

  • Optical interface with low-voltage relay unit and high-voltage regulation unit
    Patent number: 6489757
    Abstract: A photocoupler includes a signal relay unit, a voltage regulation unit and a signal amplification unit. The signal relay unit transmits an optical signal from the primary side to the secondary side. The voltage regulation unit applies only a safe voltage to the signal relay unit. The voltage regulation unit has a greater withstand voltage than the signal relay unit has. The signal amplification unit amplifies signals sent from the signal relay unit. The withstand voltage of the signal amplification unit is also greater than that of the signal relay unit.
    Type: Grant
    Filed: October 17, 2001
    Date of Patent: December 3, 2002
    Assignee: Rohm Co., Ltd.
    Inventors: Masaaki Ogata, Eiji Yokoyama
  • High-voltage interface
    Publication number: 20020043967
    Abstract: A photocoupler includes a signal relay unit, a voltage regulation unit and a signal amplification unit. The signal relay unit transmits an optical signal from the primary side to the secondary side. The voltage regulation unit applies only a safe voltage to the signal relay unit. The voltage regulation unit has a greater withstand voltage than the signal relay unit has. The signal amplification unit amplifies signals sent from the signal relay unit. The withstand voltage of the signal amplification unit is also greater than that of the signal relay unit.
    Type: Application
    Filed: October 17, 2001
    Publication date: April 18, 2002
    Inventors: Masaaki Ogata, Eiji Yokoyama
  • Bearing structures for motors
    Patent number: 5000589
    Abstract: A bearing structure for motors is provided, wherein a rotary shaft is supported by a pair of rolling bearings for rotation with respect to a housing, said rotary shaft being mounted on said pair of rolling bearings for slidable movement in the axial direction thereof.
    Type: Grant
    Filed: June 30, 1989
    Date of Patent: March 19, 1991
    Assignee: Kabushiki Kaisha Sankyo Seiki Seisakusho
    Inventors: Masaaki Ogata, Masayuki Tsuzuku