Multi-level chessboard

Details Multi-level chessboard Multi-level chessboard

1978-11-17

1980-07-15

Feifer, Melvin B.

Games, toys, and sports goods

Toy

Representation or scale model

D2101

Patent

active

D02559102

REFERENCES:
patent: D23036 (1894-02-01), Gardner
patent: D234366 (1975-02-01), Zelenko
patent: 3884474 (1975-05-01), Harper

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