Rolling straight edge

Details Rolling straight edge Rolling straight edge

1974-02-15

1977-01-11

Holtje, Nelson C.

Office supplies; artists and teachers materials

Equipment for writing, drawing, or for fine arts

Guide

D1906

Patent

active

D02430134

REFERENCES:
patent: 2543009 (1951-02-01), Frost
patent: 2800720 (1957-07-01), Kristiansen
patent: 3022073 (1962-02-01), Miller
patent: 3462846 (1969-08-01), Goerz

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