Patents by Inventor Yau-Fu Wang

Yau-Fu Wang 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).

  • Plug device
    Publication number: 20040053536
    Abstract: A plug device has conductive blades located on the front end of the plug. The conductive blades may be turned into a trough of the plug by means of a linkage means. When not in use, the conductive blades may be retracted easily in the plug to facilitate storage and reducing the thickness.
    Type: Application
    Filed: February 21, 2003
    Publication date: March 18, 2004
    Applicant: PHIHONG ENTERPRISE CO., LTD.
    Inventors: Cheng-Chuan Chen, Yau-Fu Wang