Patents by Inventor Tat Hung Au

Tat Hung 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).

  • Hair clip
    Patent number: D541983
    Type: Grant
    Filed: May 8, 2006
    Date of Patent: May 1, 2007
    Assignee: Helfrance (HK) Limited
    Inventor: Tat Hung Au