Title:
DRILLING MACHINE
United States Patent 3454114
US Patent References:
Hydraulic tower elevating device
- - 2715954

Portable drilling rig assembly
- - 2807441

Mobile roof drill
- - 2811335

Coal mining machine
- - 2880707


Inventors:
Poage, Leland B.
Publication Date:
07/08/1969
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Assignee:
ROBBINS & ASSOC JAMES S
Primary Class:
173/152
Other Classes:
173/DIG.003, 173/28, 92/117R, 173/197
International Classes:
E21B7/02; B23Q5/00; E21C5/00
Foreign References:
CA734291A




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