Patents by Inventor So V. Tien

So V. Tien 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).

  • Amorphous silicon electrographic writing head assembly with protective cover
    Patent number: 5337080
    Abstract: An amorphous silicon electrographic writing head assembly which reduces the voltage drift in the high voltage driving transistor. The writing head including a substrate having a first surface and a second surface, the first surface having thin film elements fabricated thereon, the first surface having a first region, a second region, and a third region, the first region including an array of writing electrodes, the second region including an array of high voltage transistors, and the third region including interconnecting circuitry for connecting the thin film elements to a connector. The head also includes a first cover glass fixed to the first surface of the array covering the first region and a second cover glass fixed to the first surface of the array covering the third region.
    Type: Grant
    Filed: April 27, 1993
    Date of Patent: August 9, 1994
    Assignee: Xerox Corporation
    Inventors: Patrick A. O'Connell, Robert L. Battey, Maria S. Donigan, So V. Tien, John C. Knights