Patents by Inventor Ying Wai Lau

Ying 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).

  • Vacuum cleaner
    Patent number: D459560
    Type: Grant
    Filed: August 9, 2001
    Date of Patent: June 25, 2002
    Assignee: A K Industrial Co., Ltd.
    Inventor: Ying Wai Lau