Office supplies; artists and teachers materials – Teaching material – Demonstrator or exhibitor
Patent
1980-10-27
1983-06-21
Feifer, Melvin B.
Office supplies; artists and teachers materials
Teaching material
Demonstrator or exhibitor
D1907
Patent
active
D02694484
REFERENCES:
patent: 3009265 (1961-11-01), Bezark
Fisher Bryan
Miller Richard J.
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