Office supplies; artists and teachers materials – Teaching material – Demonstrator or exhibitor
Patent
1987-11-06
1990-07-17
Burke, Wallace R.
Office supplies; artists and teachers materials
Teaching material
Demonstrator or exhibitor
Patent
active
D03093255
REFERENCES:
patent: D115067 (1939-05-01), Farkas et al.
patent: 1970285 (1934-08-01), Douvry
patent: 2184853 (1939-12-01), Smythe
Burke Wallace R.
Schmidt Pamela J.
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