Patents by Inventor Sew Hing Woo

Sew Hing Woo 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).

  • CLEANING SYSTEM
    Publication number: 20110154592
    Abstract: The present invention relates to a cleaning system that does not require the use of electrical energy to power electrical motor or pump and the like to clean condenser fins but instead uses differential in pressure between two separated chambers and magnets.
    Type: Application
    Filed: September 8, 2009
    Publication date: June 30, 2011
    Inventor: Sew Hing Woo