Patents by Inventor Ling Wai Lau

Ling Wai Lau 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).

  • Hand held vacuum cleaner
    Patent number: D514758
    Type: Grant
    Filed: October 7, 2004
    Date of Patent: February 7, 2006
    Inventor: Ling Wai Lau