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Title:
Well signaling system
Document Type and Number:
United States Patent 2354887
Inventors:
Daniel, Silverman
Fearon, Robert E.
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Sponsored by:
Flash of Genius
Publication Date:
08/01/1944
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Referenced by:
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Assignee:
STANOLIND OIL & GAS CO
Primary Class:
340/854.600
Other Classes:
324/369, 340/854.500, 175/50
International Classes:
E21B47/12
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