Patents by Inventor Tsang J. Tsai

Tsang J. Tsai 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).

  • Safety gas valve with timer
    Patent number: 4690170
    Abstract: This invention relates to a safety gas valve with timer, and in particular to one combining a valve and a timer together, whereby it can be set to close automatically at predetermined time and can be used to detect gas leakage.
    Type: Grant
    Filed: July 23, 1986
    Date of Patent: September 1, 1987
    Inventors: Tzong D. Tsai, Tsang J. Tsai