Apparatus for teaching mathematics
United States Patent 3131488
US Patent References:
/0356167.html
- - 0356167

Calculating game
- - 1528061

Device for teaching arithmetic
- - 1826034

Educational game for teaching arithmetic
- - 1836870

Arithmetic teaching aid
- - 2866278


Inventors:
Slater, Marguerite B.
Publication Date:
05/05/1964
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Assignee:
Slater, Marguerite B.
Primary Class:
434/195
International Classes:
G09B19/02