Patents by Inventor Shih-Tsun Cheng

Shih-Tsun Cheng 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).

  • Patent number: 5185853
    Abstract: A printer buffer system for connecting a number of personal computers and a number of printers includes a master printer buffer and one or more slave buffers, forming an expandable printer buffer system. Each buffer includes an input storage device for storing data, command and status signals from a personal computer or for controlling the transfer of data between the computer and the buffer as well as output storage devices for storing status, command and data signals for the transfer of data between the printer and the buffer and for controlling such transfer. Personal computers and printers may be added or removed from the system at will and the user may select a designated printer.
    Type: Grant
    Filed: January 3, 1991
    Date of Patent: February 9, 1993
    Assignee: Acer Incorporated
    Inventors: Shih-Tsun Cheng, Yung-Yen Lee