Sonic method and apparatus for surface mining mineral beds or the like
United States Patent 3033543
US Patent References:
Rooter
- - 2422490

Earth boring apparatus
- - 2554005

Ultrasonic vibratory devices
- - 2748298


Inventors:
Bodine, Albert G.
Publication Date:
05/08/1962
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Assignee:
Bodine, Albert G.
Primary Class:
299/14
Other Classes:
451/164, 37/195, 37/904, 175/56, 405/182
International Classes:
B01J19/10