Title:
Electrical system for exploring drill holes
Document Type and Number:
United States Patent 2249769
Inventors:
Leonardon, Eugene G.
Plaque It!
Sponsored by: Flash of Genius |
Publication Date:
07/22/1941
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Referenced by:
Export Citation:
Assignee:
SCHLUMBERGER WELL SURV CORP
Primary Class:
Other Classes:
324/356
International Classes:
G01V3/22; G01V3/18