Patents by Inventor Tsz Chiu Cheng

Tsz Chiu Cheng 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).

  • Toy music mixer
    Patent number: D488517
    Type: Grant
    Filed: April 30, 2003
    Date of Patent: April 13, 2004
    Assignee: Potex Toys Manufacturer Ltd.
    Inventor: Tsz Chiu Cheng
  • Toy music mixer
    Patent number: D488518
    Type: Grant
    Filed: April 30, 2003
    Date of Patent: April 13, 2004
    Assignee: Potex Toys Manufacturer Ltd.
    Inventor: Tsz Chiu Cheng