Drawing compass

Details Drawing compass Drawing compass

1989-02-27

1991-12-24

Dunkins, Bruce W.

Office supplies; artists and teachers materials

Equipment for writing, drawing, or for fine arts

Guide

D19 65, D19 35

Patent

active

D03226301

REFERENCES:
patent: D227151 (1973-06-01), Welch
patent: D240919 (1976-08-01), Yamaguchi
patent: D246981 (1978-01-01), Yamaguchi
patent: 4150486 (1979-04-01), Payton
patent: 4815881 (1989-03-01), Chern
patent: 4858326 (1989-08-01), Warwicker
patent: 4912855 (1990-04-01), Tatelbame

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