Combined set of teaching game tiles and holder

Details Combined set of teaching game tiles and holder Combined set of teaching game tiles and holder

1978-06-16

1981-04-28

Feifer, Melvin B.

Office supplies; artists and teachers materials

Teaching material

D21 51, D1907

Patent

active

D02590492

REFERENCES:
patent: 1857009 (1932-05-01), Amor
patent: 3403460 (1968-10-01), Barrows

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