Three-dimensional geometric puzzle

Details Three-dimensional geometric puzzle Three-dimensional geometric puzzle

1998-08-28

1999-08-31

Simone, Dominic

Games, toys, and sports goods

Toy

Coordination or hand-manipulative type

2101

Patent

active

D04133617

REFERENCES:
patent: D238698 (1976-02-01), Cook
patent: 260594 (1882-07-01), Mehner
patent: D262388 (1981-12-01), Bogue
patent: D340091 (1993-10-01), Miller
patent: 1565099 (1925-12-01), Nierodka
patent: 4114877 (1978-09-01), Goldfarb et al.
patent: 4298200 (1981-11-01), Kanbar
patent: 4445865 (1984-05-01), Sellon
patent: 5385473 (1995-01-01), Veltman
patent: 5746430 (1998-05-01), Chester
Tangrams-330 Puzzles; Ronald C. Read; Dover Pulications, Inc.; p. 1, original Tangram, Jan. 1965.
Catalog, MATH "Models for Geometry" pp. 84-85.

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