Rotating head for drilling

Details Rotating head for drilling Rotating head for drilling

1983-02-23

1986-01-07

Largen, James R.

Machines not elsewhere specified

Agricultural or construction machinery

Drilling, mining, or soil treatment

Patent

active

D02820730

REFERENCES:
patent: 2124840 (1938-07-01), Wrigley
patent: 3052300 (1962-09-01), Hampton
patent: 4312404 (1982-01-01), Morrow
patent: 4363357 (1982-12-01), Hunter
patent: 4398599 (1983-08-01), Murray

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