Patents by Inventor Guo Tian-Song

Guo Tian-Song 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).

  • Waste gas-purifying device
    Patent number: 5143527
    Abstract: A waste purifying device employing an intermediate exhaust fan and a vacuum pump to suck the waste gas flowing from a waste gas source toward a chimney into at least one washing tank through a pipe line, the washing tank containing a washing liquid which can remove the particles or toxic gas in the waste gas, the purified gas being then discharged from the chimney.
    Type: Grant
    Filed: April 24, 1991
    Date of Patent: September 1, 1992
    Inventor: Guo Tian-Song