Patents by Inventor David John Ditri

David John Ditri 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).

  • Integrated circuit tester having a fail-safe mechanism for moving IC-chips
    Patent number: 6581486
    Abstract: An integrated circuit tester includes a fail-safe mechanism for moving an integrated circuit chip between an initial position where the integrated circuit chip is inserted into the tester, and a test position where the integrated circuit chips is actually tested. This fail-safe mechanism includes a motor and a shaft which the motor rotates to move the integrated circuit chip. An electronic control circuit can be included to automatically stop the motor when the integrated circuit reaches its initial position, or its test position; but if the control circuit fails to operate properly, then damage to the integrated circuit tester is prevented by the fail-safe mechanism.
    Type: Grant
    Filed: October 11, 2001
    Date of Patent: June 24, 2003
    Assignee: Unisys Corporation
    Inventors: David John Ditri, Ronald Allen Norell, James Mason Brafford