Patents by Inventor Chi-Ming C. Yu

Chi-Ming C. Yu 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).

  • Filter driving mechanism for color optical reader
    Patent number: 5121158
    Abstract: A durable filter driving mechanism for a color optical reader that is capable of being positively and accurately positioned is proposed. The filter driving mechanism includes a guiding piece mounting thereon a reduction gear assembly having a reduction gear set meshing with a rack of a sliding piece having a rail coupling thereto a color filter assembly operating in cooperation with a lens assembly and a charge coupled element.
    Type: Grant
    Filed: October 31, 1990
    Date of Patent: June 9, 1992
    Assignee: Umax Data System Inc.
    Inventors: Chau-Hwang Chen, Chi-Ming C. Yu