Patents by Inventor William Wai Lun Cheung

William Wai Lun Cheung 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).

  • Fire tornado device
    Patent number: D622318
    Type: Grant
    Filed: January 13, 2010
    Date of Patent: August 24, 2010
    Assignee: Science Centre Board
    Inventors: Her Mann Tsai, William Wai Lun Cheung, Paari Perumal