Drill level attachment

Details Drill level attachment Drill level attachment

1997-10-31

1998-09-08

Davis, Antoine Duval

Measuring, testing, or signalling instruments

Measuring, regulating or indicating instrument, or casing

Geometric

1004

Patent

active

D03979482

REFERENCES:
patent: D305202 (1989-12-01), Johnson
patent: D363033 (1995-10-01), Doucet
patent: 4141151 (1979-02-01), Jansky
patent: 4295279 (1981-10-01), Sienknecht
patent: 4402141 (1983-09-01), Sterrenberg
patent: 4432146 (1984-02-01), Klein
patent: 4656749 (1987-04-01), Ahsley et al.
patent: 4663856 (1987-05-01), Hall et al.

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