Ruler with drawing curves

Details Ruler with drawing curves Ruler with drawing curves

1997-10-20

1998-07-28

Davis, Antoine Duval

Measuring, testing, or signalling instruments

Measuring, regulating or indicating instrument, or casing

Geometric

D10 64, D10 71, 1004

Patent

active

D03964221

REFERENCES:
patent: D192748 (1962-05-01), Brockman
patent: D267932 (1983-02-01), Sidrak
patent: D271381 (1983-11-01), Sidrak
patent: D340652 (1993-10-01), Shapiro

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