Patents by Inventor Yuk San Au

Yuk San Au 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).

  • Umbrella with twin lights
    Patent number: D422784
    Type: Grant
    Filed: September 26, 1998
    Date of Patent: April 18, 2000
    Inventor: Yuk San Au
  • Umbrella handle with torch
    Patent number: D425695
    Type: Grant
    Filed: December 11, 1998
    Date of Patent: May 30, 2000
    Inventor: Yuk San Au