Patents by Inventor Yun Sang Leung

Yun Sang Leung 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).

  • Pen with lots drawing device
    Patent number: D583410
    Type: Grant
    Filed: December 18, 2006
    Date of Patent: December 23, 2008
    Assignee: Sane (Asia Pacific) Ltd.
    Inventor: Yun Sang Leung