Ruler with adjustable diameter compass

Details Ruler with adjustable diameter compass Ruler with adjustable diameter compass

1994-03-08

1995-04-11

Douglas, Alan P.

Measuring, testing, or signalling instruments

Measuring, regulating or indicating instrument, or casing

Geometric

D10 65, D10 71

Patent

active

D03571955

REFERENCES:
patent: D312795 (1990-12-01), Fugett
patent: 2659976 (1953-11-01), Callahan
patent: 3003244 (1961-10-01), Fogliano
patent: 4069592 (1978-01-01), Hosae

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