Combined drill and counterbore bits

Details Combined drill and counterbore bits Combined drill and counterbore bits

1999-01-14

2000-01-25

Davis, Antoine Duval

Machines not elsewhere specified

Material working, abrading, or founding machinery

Element or attachment

1509

Patent

active

D04195760

REFERENCES:
patent: D408424 (1999-04-01), Schmotzer
patent: 808245 (1905-12-01), Lund
patent: 5149231 (1992-09-01), Bowling

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