Scalene triangle puzzle

Details Scalene triangle puzzle Scalene triangle puzzle

1999-08-02

2000-08-22

Simone, Dominic

Games, toys, and sports goods

Toy

Coordination or hand-manipulative type

2101

Patent

active

D0429775&

REFERENCES:
patent: 143835 (1873-10-01), Muller
patent: D218242 (1970-08-01), Gompes et al.
patent: 260594 (1882-07-01), Mehner
patent: 1173298 (1916-02-01), Montessori
patent: 1261710 (1918-04-01), Coyle
patent: 1271997 (1918-07-01), Benedict
patent: 1565099 (1925-12-01), Nierodka
patent: 4487585 (1984-12-01), Goldwasser
patent: 6027117 (2000-02-01), Goldberg

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