Arithmetic teaching device

Details Arithmetic teaching device Arithmetic teaching device

1999-02-18

1999-11-23

Nguyen, Kien T.

Education and demonstration

Mathematics

434191, 434200, 434209, 2063151, G09B 1902

Patent

active

059890355

ABSTRACT:
A arithmetic teaching device for teaching a child mathematics. The arithmetic teaching device includes a housing that has a bottom and a peripheral sidewall upwardly extending from the bottom. A counting box has an open upper face and a plurality of compartments therein. The counting box is removably disposed in the housing. A plurality of counting objects are disposed in the housing. The counting objects are positionable in the compartments of the counting box.

REFERENCES:
patent: 1288267 (1918-12-01), Stone
patent: 1507915 (1924-09-01), Goldsmith
patent: 5366069 (1994-11-01), Seidner
patent: 5439108 (1995-08-01), Lackie
patent: 5638838 (1997-06-01), Lombardi
patent: 5692605 (1997-12-01), Lai

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