Education and demonstration – Mathematics – Arithmetic
Patent
1993-04-12
1994-03-29
Weiss, John G.
Education and demonstration
Mathematics
Arithmetic
434205, 434208, G09B 100, G09B 1902, G09B 1900
Patent
active
052979652
ABSTRACT:
A mathematical and spatial toy apparatus is arranged to include a grooved rack board arranged to receive individual block components to teach children the mathematical cumulative effect of such boards to provide rudimentary teaching in mathematical and spatial relationships.
REFERENCES:
patent: 1183570 (1916-05-01), Kneeshaw
patent: 1471437 (1923-10-01), Wood
patent: 2494469 (1950-01-01), Booth
patent: 2809443 (1957-10-01), Hospodar
patent: 3410002 (1968-11-01), Mulholland et al.
Cherichetti Cindy A.
Gilden Leon
Weiss John G.
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