Patents by Inventor Soumyo Doi

Soumyo Doi 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).

  • Potential sensor for detecting voltage of inspection target at non-contact condition to attain higher speed of inspection
    Patent number: 6667632
    Abstract: A potential sensor, includes a field effect transistor, a power supply and a switching device. The power supply supplies a direct current voltage to a gate electrode of the field effect transistor. The switching device switches between connecting the gate electrode to the power supply and disconnecting the gate electrode from the power supply. When the gate electrode is connected to the power supply, the field effect transistor is in action. When the gate electrode is disconnected from the power supply, the field effect transistor is in action.
    Type: Grant
    Filed: April 24, 2001
    Date of Patent: December 23, 2003
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Shinichi Murakawa, Soumyo Doi, Yoshio Egashira, Tadashi Rokkaku, Shigeo Ueda
  • Potential sensor for detecting voltage of inspection target at non-contact condition to attain higher speed of inspection
    Publication number: 20020153919
    Abstract: A potential sensor, includes a field effect transistor, a power supply and a switching device. The power supply supplies a direct current voltage to a gate electrode of the field effect transistor. The switching device switches between connecting the gate electrode to the power supply and disconnecting the gate electrode from the power supply. When the gate electrode is connected to the power supply, the field effect transistor is in action. When the gate electrode is disconnected from the power supply, the field effect transistor is in action.
    Type: Application
    Filed: April 24, 2001
    Publication date: October 24, 2002
    Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Shinichi Murakawa, Soumyo Doi, Yoshio Egashira, Tadashi Rokkaku, Shigeo Ueda