Office supplies; artists and teachers materials – Teaching material – Demonstrator or exhibitor
Patent
1980-07-14
1982-05-18
Lee, Lester L.
Office supplies; artists and teachers materials
Teaching material
Demonstrator or exhibitor
D1907
Patent
active
D02644800
REFERENCES:
patent: 4178699 (1979-12-01), Burkhart
Aero Systems Research, Inc.
Lee Lester L.
Wymore Max L.
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