Mechanical pencil

Details Mechanical pencil Mechanical pencil

1993-04-21

1997-11-04

Thompson, Martie

Office supplies; artists and teachers materials

Equipment for writing, drawing, or for fine arts

Marking instrument

D19 49, D19 51, D19 56, 1906

Patent

active

D03859142

REFERENCES:
patent: D216844 (1970-03-01), Shimada
patent: D308396 (1990-06-01), Sekiguchi
patent: D309633 (1990-07-01), Itoh
patent: D335306 (1993-05-01), Poisson et al.

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