Patents by Inventor Cheng-Plug Chang

Cheng-Plug Chang 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).

  • Downdraft fume hood
    Publication number: 20070021046
    Abstract: The present invention is a fume hood with a mechanism of air suction together with air supply to save energy while locally exhausting pernicious gases near a contaminant source.
    Type: Application
    Filed: July 19, 2005
    Publication date: January 25, 2007
    Inventors: Rong Huang, Yu-Kang Chen, Tung-Sheng Shih, Cheng-Plug Chang, Chun-Wan Chen, Yi-Ta Wu, Hung-Ta Chen