Patents by Inventor Yiu K. Leung

Yiu K. Leung 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).

  • Interface for a data telephone and data terminal in a digital telephone system
    Patent number: 5317630
    Abstract: A data terminal interface for a terminal adapter and an attached computer provides complete flexibility and control of information in a communication environment for a user. Communications between the terminal adapter and a digital network may be provided in existing digital systems, such as either the Digital Communications Protocol or Integrated Services Digital Network system, for example. The data terminal interface facilitates the exchange of information between the terminal adapter and the computer via an asynchronous data module in the terminal adapter. Through the data terminal interface, the computer is able to directly control user interface circuitry in the terminal adapter by responding to and sending unlimited information to this interface circuitry since conformance to a digital protocol is not required for message traffic between these two units.
    Type: Grant
    Filed: September 10, 1990
    Date of Patent: May 31, 1994
    Assignee: AT&T Bell Laboratories
    Inventors: Lee A. Feinberg, Yiu K. Leung