Title:
Educational question and answer toy
United States Patent 2742713
US Patent References:
Educational device or game
- - 1948712

Educational device
- - 2317107

Test device
- - 2496767


Inventors:
Oscar, Villanueva
Publication Date:
04/24/1956
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Assignee:
Oscar, Villanueva
Primary Class:
434/332
International Classes:
G09B19/02