Office supplies; artists and teachers materials – Teaching material – Demonstrator or exhibitor
Patent
1982-01-05
1984-09-04
Feifer, Melvin B.
Office supplies; artists and teachers materials
Teaching material
Demonstrator or exhibitor
D21108
Patent
active
D02754053
REFERENCES:
patent: 2853804 (1958-09-01), Bengeyfield
patent: 3744235 (1973-07-01), Kratomi
Farber Martin A.
Feifer Melvin B.
VDO Adolf Schindling AG
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