Ruler

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

Patent

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Details

D1906

Patent

active

D02440903

REFERENCES:
patent: D25261 (1896-03-01), Wilson
patent: D208666 (1967-09-01), Fresco
patent: 334932 (1886-01-01), Bolton
patent: 566195 (1896-08-01), Leavitt
patent: 2182028 (1939-12-01), Little

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