Apparatus for locating hydrocarbon deposits in the earth
United States Patent 2112845

Inventors:
Howell, Lynn G.
Publication Date:
04/05/1938
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Assignee:
STANDARD OIL DEV CO
Primary Class:
73/864.730
Other Classes:
166/67, 436/29, 250/256, 73/19.100
International Classes:
G01V9/00