Patents by Inventor Wen Cheng Pan

Wen Cheng Pan 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).

  • Stop valve for basin or sewer
    Patent number: 6553583
    Abstract: A stop valve device includes a container having an outlet opening, a valve controlled to open and to close the outlet opening of the container. A casing is received in the outlet opening of the container and includes a number of orifices for filtering purposes. A cover is engaged on top of the casing and includes a number of apertures for water flowing purposes. The cover includes one or more outward extending pins engaged in the grooves formed in the container for pivotally securing the cover to the container and for preventing over turning of the cover and the casing.
    Type: Grant
    Filed: February 5, 2002
    Date of Patent: April 29, 2003
    Inventor: Wen Cheng Pan