Title:
Earth borehole logging system
United States Patent 2890019
Inventors:
Arps, Jan J.
Application Number:
US57370456A
Publication Date:
06/09/1959
Filing Date:
03/26/1956
Assignee:
Arps, Jan J.
Primary Class:
Other Classes:
73/152.01, 175/325.2, 324/323
International Classes:
E21B17/10; E21B41/00; E21B47/18
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