Patents by Inventor Takanori Yonekura

Takanori Yonekura 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).

  • Polarity compensated apparatus for measuring the impedance of a polar device
    Patent number: 4820969
    Abstract: This invention provides a polar device measuring apparatus which can bias a device under test in a proper polarity. The measuring apparatus is computer-controlled and automatically selects the polarity of the bias voltage based on the measured value of voltage across the device.
    Type: Grant
    Filed: April 22, 1988
    Date of Patent: April 11, 1989
    Assignee: Hewlett-Packard Company
    Inventors: Takanori Yonekura, Tomio Wakasugi