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Core logging
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Patent number 4,623,792
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Issue date Nov 18, 1986
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General Mining Union Corporation Limited
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Rolf C. Bohme
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G01 - MEASURING TESTING
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3372992
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Patent number 3,372,992
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Issue date Mar 12, 1968
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G01 - MEASURING TESTING
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3351760
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Patent number 3,351,760
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Issue date Nov 7, 1967
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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3247380
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Patent number 3,247,380
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Issue date Apr 19, 1966
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G01 - MEASURING TESTING
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3222521
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Patent number 3,222,521
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Issue date Dec 7, 1965
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G01 - MEASURING TESTING