Writing instrument

Office supplies; artists and teachers materials – Equipment for writing – drawing – or for fine arts – Marking instrument

Patent

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Details

D19 51, D19 56, D19 57, 1906

Patent

active

D03986411

REFERENCES:
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patent: 1742264 (1930-01-01), Kristofek
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patent: 4459059 (1984-07-01), Greenspan
patent: 4765767 (1988-08-01), Marynissen et al.
Pentel Micro Permaroller Pen, MR205 USA, 1986.

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