Patents by Inventor Haven Kam-Chuen Tsang

Haven Kam-Chuen Tsang 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).

  • Foldable vase
    Publication number: 20040187382
    Abstract: A foldable vase having upper and base portions of such plastic film layers as polyvinylchloride spreadably openable from an initial flat configuration upon immersion in warm water, and hardenable to a predetermined shape when thereafter filled with cold water.
    Type: Application
    Filed: March 25, 2003
    Publication date: September 30, 2004
    Inventor: Haven Kam-Chuen Tsang