Multi-purpose instructing block

Details Multi-purpose instructing block Multi-purpose instructing block

1983-12-30

1985-05-21

Grieb, William H.

Education and demonstration

Mathematics

Arithmetic

G09B 1902

Patent

active

045183597

ABSTRACT:
A multi-purpose instructing block comprising one hundred blocks divided into ten sets and a calculating frame having two grooves which are designed so that the blocks therein may be moved along the grooves. The blocks of the same set are of a size and color but the blocks of different sets differ in color and length. The multi-purpose instructing block is useful to interest the children in calculating, distinguishing between colors, learning alphabets in addition to making toy houses.

REFERENCES:
patent: 971185 (1910-09-01), Freeman
patent: 1594376 (1926-08-01), Passmore
patent: 2494469 (1950-01-01), Booth
patent: 3229388 (1966-01-01), Smith
patent: 3410002 (1968-11-01), Mulholland et al.

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