Mechanical drawing implement

Details Mechanical drawing implement Mechanical drawing implement

1983-02-07

1986-03-25

Word, George P.

Measuring, testing, or signalling instruments

Measuring, regulating or indicating instrument, or casing

Geometric

D10 65

Patent

active

D02831104

REFERENCES:
patent: 1523919 (1925-01-01), Viteic et al.
patent: 2149422 (1939-03-01), Coffey

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