Patents by Inventor D. R. Gunawardena

D. R. Gunawardena 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 automated cassette handling
    Patent number: 4923353
    Abstract: An automated cassette handler transports a cassette containing integrated circuit wafers between first and second elevators in a standardized mechanical interface (SMIF) system for integrated circuit processing. The handler is adapted to grip and transport the cassette while positively pushing the wafers into the cassette.
    Type: Grant
    Filed: July 9, 1987
    Date of Patent: May 8, 1990
    Assignee: Hewlett-Packard Company
    Inventors: Barclay J. Tullis, John S. Bailey, D. R. Gunawardena, Ulrich Kaempf
  • Method for automated cassette handling
    Patent number: 4875825
    Abstract: An automated cassette handler is disclosed for transporting a cassette containing integrated circuit wafers between first and second elevators in a standardized mechanical interface (SMIF) system for integrated circuit processing. The handler is adapted to grip and transport the cassette while positively pushing the wafers into the cassette.
    Type: Grant
    Filed: November 10, 1987
    Date of Patent: October 24, 1989
    Assignee: Hewlett-Packard Company
    Inventors: Barclay J. Tullis, John S. Bailey, D. R. Gunawardena, Ulrich Kaempf
  • Apparatus for automated cassette handling
    Patent number: 4705444
    Abstract: An automated cassette handler for transporting a cassette containing integrated circuit wafers between first and second elevators in a standardized mechanical interface (SMIF) system for integrated circuit processing. The handler is adapted to grip and transport the cassette while positively pushing the wafers into the cassette.
    Type: Grant
    Filed: July 24, 1985
    Date of Patent: November 10, 1987
    Assignee: Hewlett-Packard Company
    Inventors: Barclay J. Tullis, John S. Bailey, D. R. Gunawardena, Ulrich Kaempf