Patents by Inventor Kai On Wong

Kai On Wong 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).

  • Can opener
    Patent number: D406222
    Type: Grant
    Filed: October 27, 1997
    Date of Patent: March 2, 1999
    Assignee: Hung Sang Metal Plasticfactory Ltd.
    Inventor: Kai On Wong