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Janice R. Johnson
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Houston, TX, US
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Patents Grants
last 30 patents
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Patent Grant
Access apparatus from a tubular into a downhole hydraulic control c...
Patent number
7,703,538
Issue date
Apr 27, 2010
Baker Hughes Incorporated
Janice R. Johnson
E21 - EARTH DRILLING MINING
Patents Applications
last 30 patents
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Patent Application
Access apparatus from a tubular into a downhole hydraulic control c...
Publication number
20070295511
Publication date
Dec 27, 2007
Janice R. Johnson
E21 - EARTH DRILLING MINING