Title:
Apparatus for logging wells
United States Patent 2787759
Inventors:
Arps, Jan J.
Application Number:
US18260450A
Publication Date:
04/02/1957
Filing Date:
08/31/1950
Assignee:
Arps, Jan J.
Primary Class:
Other Classes:
137/47, 137/802, 175/50, 310/15, 318/141, 324/323, 367/175
International Classes:
E21B47/18; G01V3/34
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