Patents by Inventor Youko Yaguchi

Youko Yaguchi 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 for measuring the amount of electric charge induced in conductive part and method of measuring electric charge
    Patent number: 6107804
    Abstract: A measuring apparatus has a capacitor incorporated in a handy measuring tool electrically connected to a voltage meter, and a sharp leading end of the capacitor is brought into contact with a lead of a large scale integrated circuit device for accumulating movable electric charge induced in the presence of a charged insulating package into the capacitor so that the amount of the accumulated movable electric charge is calculated from a potential difference produced between electrodes of the capacitor.
    Type: Grant
    Filed: March 10, 1998
    Date of Patent: August 22, 2000
    Assignee: NEC Corporation
    Inventors: Kouichi Suzuki, Youko Yaguchi, Juniti Yamaguchi
  • Apparatus and method for measuring a movable electric charge induced in a conductive member
    Patent number: 6034530
    Abstract: A measuring apparatus has a capacitor incorporated in a handy measuring tool electrically connected to a voltage meter, and a sharp leading end of the capacitor is brought into contact with a lead of a large scale integrated circuit device for accumulating movable electric charge induced in the presence of a charged insulating package into the capacitor so that the amount of the accumulated movable electric charge is calculated from a potential difference produced between electrodes of the capacitor.
    Type: Grant
    Filed: May 31, 1995
    Date of Patent: March 7, 2000
    Assignee: NEC Corporation
    Inventors: Kouichi Suzuki, Youko Yaguchi, Juniti Yamaguchi