Patents by Inventor Chris DeGraw

Chris DeGraw 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).

  • High speed track shutter system for semi-conductor inspection
    Patent number: 6444935
    Abstract: The present invention provides a shutter system for use with an automated semiconductor chip handling device. The semiconductor chip handling device includes a track down which semiconductor chips travel. Reliefs are positioned on the track to prevent the semiconductor chips from escaping. A gap in the relief provides access to the semiconductor chips so that they may be removed from the track. A pair of shutters pivot between a first position where they cover the gap and a second position where the gap is uncovered so that chips may be removed from the gap without chips escaping from the track during normal operation.
    Type: Grant
    Filed: October 18, 2000
    Date of Patent: September 3, 2002
    Assignee: Electro Scientific Industries, Inc.
    Inventor: Chris DeGraw