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2798378
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Information
Patent Grant
2798378
References
Source
Patent Number
2,798,378
Date Filed
Not available
Date Issued
Tuesday, July 9, 1957
67 years ago
CPC
E21B25/18 - the core receiver being specially adapted for operation under water
E21B7/132 - from underwater buoyant support
G01V9/00 - Prospecting or detecting by methods not provided for in groups G01V1/00 - G01V8/00
US Classifications
175 - Boring or penetrating the earth
073 - Measuring and testing
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