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John M. Corben
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Clamart, FR
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last 30 patents
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Patent number
7,455,104
Issue date
Nov 25, 2008
Schlumberger Technology Corporation
Mark C. Duhon
E21 - EARTH DRILLING MINING
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20020056553
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May 16, 2002
Mark C. Duhon
E21 - EARTH DRILLING MINING