Mechanical carpenter's pencil

Details Mechanical carpenter's pencil Mechanical carpenter's pencil

1996-07-03

1998-01-20

Thompson, Martie

Office supplies; artists and teachers materials

Equipment for writing, drawing, or for fine arts

Marking instrument

D19 50, D19 45, 1906

Patent

active

D03895190

REFERENCES:
patent: D232267 (1974-07-01), Zepell
patent: D238359 (1976-01-01), Zepell
patent: D252690 (1979-08-01), Wong
patent: D263317 (1982-03-01), Swensson
patent: D322282 (1991-12-01), Mishima
patent: D344760 (1994-03-01), Monzyk
Gift and Art Buyer, May 1963, p. 110 see pen upper left.

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