Protractor

Details Protractor Protractor

1997-11-26

1998-09-29

Davis, Antoine Duval

Measuring, testing, or signalling instruments

Measuring, regulating or indicating instrument, or casing

Geometric

1004

Patent

active

D03988678

REFERENCES:
patent: D267932 (1983-02-01), Sidrak
patent: 3579841 (1971-05-01), Peterson

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