Title:
Free corer
United States Patent 3078931
US Patent References:
Core barrel for oil well apparatus
- - 2145170
Coring apparatus
- - 2260320
Bottom sampler
- - 2488486
Coring method and apparatus
- - 2650068
Automatic marine geological sample extractor
- - 2798378
Core barrel for oil well apparatus
- - 2145170
Coring apparatus
- - 2260320
Bottom sampler
- - 2488486
Coring method and apparatus
- - 2650068
Automatic marine geological sample extractor
- - 2798378
Inventors:
Moore, David G.
Publication Date:
02/26/1963
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Assignee:
Moore, David G.
Primary Class:
Other Classes:
114/294, 175/60, 175/247
International Classes:
E21B25/18; E21B25/00