Rotary excavator
United States Patent 2085336

Inventors:
Sandstone, Harvey D.
Publication Date:
06/29/1937
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Assignee:
Sandstone, Harvey D.
Primary Class:
175/104
Other Classes:
175/263, 175/173, 175/393, 175/227, 175/388, 175/96, 175/348, 175/394, 175/335, 175/401, 173/79, 310/75D, 310/112
International Classes:
E21B10/00; E21B10/34; E21D1/06; E21B10/26; E21D1/00