Patents by Inventor Yang-Chern Chen

Yang-Chern 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).

  • Extended time-shared scanning keyboard interface
    Patent number: 5274371
    Abstract: A time-shared scanning technique is employed to detect the maximum keys with a keyboard interface. A detecting signal is transmitted, in turn, to the keyboard interface ports in consecutive clock phases. Since every keyboard interface port is independent of each other port, each can detect and record the status of the keyboard except when activated by the detecting signal to transmit a scanning signal utilized to scan all of the other ports. The number of keys that can be detected by the present keyboard interface is about twice that of the conventional keyboard interface.
    Type: Grant
    Filed: January 29, 1991
    Date of Patent: December 28, 1993
    Assignee: Industrial Technology Research Institute
    Inventors: Huei-Ming Yang, Yang-Chern Chen