Multi purpose drawing implement

Details Multi purpose drawing implement Multi purpose drawing implement

1992-01-27

1993-10-26

Douglas, Alan P.

Measuring, testing, or signalling instruments

Measuring, regulating or indicating instrument, or casing

Geometric

D10 71, D19 37, D19 39

Patent

active

D03406520

REFERENCES:
patent: D192748 (1962-05-01), Brockman
patent: 2016489 (1935-10-01), Escalante
patent: 2507073 (1950-05-01), White
patent: 4524522 (1985-06-01), Perry

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