Patents by Inventor Huan-Tong Yang

Huan-Tong Yang 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).

  • Low power consumption relay switching circuit for use in conjunction with a line test trunk interfacing to a test desk
    Patent number: 4204241
    Abstract: An improved circuit for interfacing between a test desk, a subscriber line and an electronic switching center is disclosed herein. The disclosed improvements allow the relay circuit to operate in response to a predetermined threshold current value while requiring only a minimal current flow and thereby providing the capability to use components lower rated in terms of power consumption.
    Type: Grant
    Filed: December 26, 1978
    Date of Patent: May 20, 1980
    Assignee: GTE Automatic Electric Laboratories Incorporated
    Inventor: Huan-Tong Yang