Paralytic communication board

Details Paralytic communication board Paralytic communication board

1982-06-04

1984-10-23

Feifer, Melvin B.

Office supplies; artists and teachers materials

Teaching material

Patent

active

D02760541

REFERENCES:
patent: D41807 (1911-09-01), Beach
patent: 4204341 (1980-05-01), Nowak

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