Patents by Inventor Huang Y. Sheng

Huang Y. Sheng 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).

  • Method and apparatus for prohibiting unauthorized use of a telecommunication line
    Patent number: 5544221
    Abstract: A method and apparatus for prohibiting unauthorized use of a telecommunication line is provided. An interference signal is timely generated by the invention on the telecommunication line such that the illegitimate user may not dial the number correctly. Therefore, the invention may prohibit the unauthorized use of a telecommunication line.
    Type: Grant
    Filed: September 16, 1994
    Date of Patent: August 6, 1996
    Assignee: Winbond Electronics Corporation
    Inventors: Huang Y. Sheng, Ching-hung Tsai, Wu J. Kuang