Office supplies; artists and teachers materials – Equipment for writing – drawing – or for fine arts – Marking instrument
Patent
1976-04-26
1977-12-20
Holtje, Nelson C.
Office supplies; artists and teachers materials
Equipment for writing, drawing, or for fine arts
Marking instrument
D1902
Patent
active
D02467453
REFERENCES:
patent: 2595713 (1952-05-01), Siernos
patent: 3308947 (1967-03-01), Dundam
patent: 3763871 (1973-10-01), Jobst
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