Patents by Inventor Maisy Min-Shih Wai

Maisy Min-Shih Wai 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).

  • Electronic learning aid housing
    Patent number: D422033
    Type: Grant
    Filed: February 16, 1999
    Date of Patent: March 28, 2000
    Assignee: Vtech Electronics Limited
    Inventors: Maisy Min-Shih Wai, Frederick Lam-Tak Tsang