John E. Kotrla

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Katy, TX, US

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Patents Grantslast 30 patents

Information 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 Applicationslast 30 patents

Information Patent Application
RISER SYSTEM
- Publication number 20130043036
- Publication date Feb 21, 2013
- Cameron International Corporation
- John E. Kotrla
- E21 - EARTH DRILLING MINING