Patents by Inventor Mui Ka Yu

Mui Ka Yu 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).

  • Interactive toy
    Patent number: D636445
    Type: Grant
    Filed: January 30, 2009
    Date of Patent: April 19, 2011
    Assignee: Leapfrog Enterprises, Inc.
    Inventors: Jason Avery, Mui Ka Yu, John Caldwell