Title:
Fuel powered sediment corer
United States Patent 3155174

Inventors:
Niskin, Shale J.
Publication Date:
11/03/1964
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Assignee:
Stevenson, Clark P.
Primary Class:
Other Classes:
175/245, 335/285, 175/6, 114/295, 89/1.150, 175/254
International Classes:
E21B7/124; E21B49/04; E21B7/12; E21B49/00
US Patent References:
3078931Free corer