Design apparatus

Details Design apparatus Design apparatus

1992-06-02

1993-11-23

Will, Thomas B.

Geometrical instruments

Scriber

Parallel line

B43L 1300

Patent

active

052632598

ABSTRACT:
A body having a pair of holes is provided to hold a pair of pencils or the like. The bores are provided with a threaded interior surface into which the instrument may be screwed and held.

REFERENCES:
patent: 243255 (1981-06-01), Hepp
patent: 1559089 (1925-10-01), Hagan et al.
patent: 2498105 (1950-02-01), Dolan

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