Office supplies; artists and teachers materials – Teaching material
Patent
1976-11-24
1979-06-12
Feifer, Melvin B.
Office supplies; artists and teachers materials
Teaching material
D 6216, D 6258, D 6264, D25 93, D92 1R, D21105, D1907
Patent
active
D02520923
REFERENCES:
patent: D177897 (1956-06-01), Carver
Feifer Melvin B.
Zinn Robert J.
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