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|---|
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[patent_doc_number] => 04940943
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[patent_issue_date] => 1990-07-10
[patent_title] => 'Method and apparatus for optimizing the reception pattern of the antenna of a propagating electromagnetic wave logging tool'
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[patent_issue_date] => 1989-11-14
[patent_title] => 'Method and apparatus for measuring and precisely locating internal tensile stresses in hardened regions of components by measuring coercive field strength and barkhausen noise amplitude'
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| 07/181451 | OSCILLATION FREQUENCY SHIFT APPARATUS AND METHOD FOR CHARACTERIZING CONDUCTIVITY OF MATERIALS | Apr 12, 1988 | Abandoned |
| 07/176085 | LOGGING APPARATUS HAVING MULTIPLE FOCUS CURRENT SOURCES FOR MEASUREMENT OF EARTH FORMATION RESISTIVITY AT MULTIPLE LATERAL DEPTHS | Mar 31, 1988 | Abandoned |
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