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3328681
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Information
Patent Grant
3328681
References
Source
Patent Number
3,328,681
Date Filed
Not available
Date Issued
Tuesday, June 27, 1967
56 years ago
CPC
E21B47/082 - using radiant means
E21B47/0905 - by detecting magnetic anomalies
G01N27/906 - Compensating for velocity
US Classifications
324 - Electricity: measuring and testing
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