Patents by Inventor Kai Ching A. Yau

Kai Ching A. Yau 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).

  • Patent number: D352565
    Type: Grant
    Filed: June 24, 1992
    Date of Patent: November 15, 1994
    Assignee: Practical Products Mfy. Ltd.
    Inventor: Kai Ching A. Yau