Cutting tooth for a rotating drag bit

Details Cutting tooth for a rotating drag bit Cutting tooth for a rotating drag bit

1986-10-16

1990-04-17

Holtje, Nelson C.

Machines not elsewhere specified

Agricultural or construction machinery

Drilling, mining, or soil treatment

D15139

Patent

active

D03072797

REFERENCES:
patent: 3771612 (1973-11-01), Adcock
patent: 4181187 (1980-01-01), Lumen
patent: 4211508 (1980-07-01), Dill et al.
patent: 4452324 (1984-06-01), Jurgens
patent: 4471845 (1984-09-01), Juergens
patent: 4505342 (1985-03-01), Barr et al.
patent: 4545441 (1985-10-01), Williamson
patent: 4577706 (1986-03-01), Barr
patent: 4705124 (1987-11-01), Abrahamson et al.
patent: 4722405 (1988-02-01), Langford
patent: 4733734 (1988-03-01), Bardin et al.

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