Roof drill bit for mining machine

Details Roof drill bit for mining machine Roof drill bit for mining machine

1993-07-19

1994-10-04

Douglas, Alan P.

Machines not elsewhere specified

Material working, abrading, or founding machinery

Element or attachment

Patent

active

D03511740

REFERENCES:
patent: 4440247 (1984-04-01), Sartor
patent: 4733734 (1988-03-01), Bardin et al.
patent: 4817742 (1989-04-01), Whysong
patent: 4928777 (1990-05-01), Shirley-Fisher

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