Patents by Inventor Pi S. Chen

Pi S. Chen 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).

  • Lunch box
    Patent number: D310156
    Type: Grant
    Filed: April 1, 1987
    Date of Patent: August 28, 1990
    Inventor: Pi S. Chen