Patents by Inventor Yasusi Nagasawa

Yasusi Nagasawa 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).

  • Probe apparatus
    Patent number: 5220279
    Abstract: A probe apparatus has a mount on which the object to be examined is placed, a large number of vertical probe needles, brought into contact with electrode pads of the object to be examined, for measuring the electrical characteristics of the object to be examined, and a cleaning block including a cleaning member for removing waste adhered to the vertical probe needles, the cleaning member including a cloth which is made up of extra fine fibers. Using the cleaning member, waste and the like adhered to the vertical probe needles can be removed, ensuring the long life of the vertical probe needles.
    Type: Grant
    Filed: June 12, 1992
    Date of Patent: June 15, 1993
    Assignee: Tokyo Electron Yamanashi Limited
    Inventor: Yasusi Nagasawa