Drawing instrument

Details Drawing instrument Drawing instrument

1979-12-03

1981-10-20

Holtje, Nelson C.

Measuring, testing, or signalling instruments

Measuring, regulating or indicating instrument, or casing

Geometric

D1004

Patent

active

D02613689

REFERENCES:
patent: D116007 (1939-08-01), Bakallie
patent: D116008 (1939-08-01), Bakallie
patent: D141882 (1945-07-01), Matson
patent: D204017 (1966-03-01), Goldman
Art Brown Cat. .COPYRGT.1973-p. 149-Isometric Ellipse Template.

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