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John E. Kotrla
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Katy, TX, US
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Patents Grants
last 30 patents
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Patent Grant
Riser system
Patent number
8,657,013
Issue date
Feb 25, 2014
Cameron International Corporation
John E. Kotrla
E21 - EARTH DRILLING MINING
Patents Applications
last 30 patents
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Patent Application
RISER SYSTEM
Publication number
20130043036
Publication date
Feb 21, 2013
Cameron International Corporation
John E. Kotrla
E21 - EARTH DRILLING MINING