Office supplies; artists and teachers materials – Teaching material
Patent
1980-10-14
1983-01-25
Feifer, Melvin B.
Office supplies; artists and teachers materials
Teaching material
D1907
Patent
active
D02677261
REFERENCES:
patent: D229563 (1973-12-01), Sirkin
patent: D235441 (1975-06-01), Valentine
patent: 2878587 (1959-03-01), Jubenville
patent: 4198768 (1980-04-01), Wahl et al.
Feifer Melvin B.
Ginsburg Paul H.
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