Patents by Inventor Tung Y. Chu

Tung Y. Chu 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).

  • Multi-purpose learning device
    Patent number: 4914019
    Abstract: This invention deals with a multi-purpose learning device for mathematics, language, logic reasoning, and classification of objects.
    Type: Grant
    Filed: February 6, 1989
    Date of Patent: April 3, 1990
    Inventor: Tung Y. Chu