Patents by Inventor Kai Yuan Liu

Kai Yuan Liu 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).

  • Water treatment filter wool balls
    Patent number: 5985148
    Abstract: A water treatment filter wool ball includes a plastic ball and wool bundles planted on the surface of the plastic ball. In use, a plurality of plastic balls are put in a filter tank. The wool bundles can culture both anaerobic and aerobic bacteria to decompose toxic substances in the tank. Water can be purified in a very short time.
    Type: Grant
    Filed: December 12, 1997
    Date of Patent: November 16, 1999
    Inventor: Kai Yuan Liu