Patents by Inventor W. S. Chen

W. S. Chen 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).

  • Contact image sensor for use with a single ended power supply
    Patent number: 6014230
    Abstract: A contact image sensor for use in a fax machine or scanner, including a driver, at least one sensor chip, an analog switch, a capacitor, an operational amplifier, a uni-power supply, a voltage converter, and a voltage converter. In an alternate form of the present invention, the operational amplifier and the voltage converter are omitted.
    Type: Grant
    Filed: June 4, 1996
    Date of Patent: January 11, 2000
    Assignee: Dyna Image Corporation
    Inventors: Chiden Cheng, W. S. Chen, Tonny Fu, H. Y. Chen