Patents by Inventor Yung Yuan Su

Yung Yuan Su 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).

  • Screwdriver handle
    Patent number: D520325
    Type: Grant
    Filed: August 23, 2004
    Date of Patent: May 9, 2006
    Inventor: Yung Yuan Su
  • Screw driver handle
    Patent number: D422475
    Type: Grant
    Filed: July 1, 1999
    Date of Patent: April 11, 2000
    Inventor: Yung Yuan Su