Zhen LIU

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Houston, TX, US

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Patents Grantslast 30 patents

Information Patent Grant
Subsea sensors display system and method
- Patent number 8,875,795
- Issue date Nov 4, 2014
- Hydril USA Manufacturing LLC
- Devasish Choudhury
- E21 - EARTH DRILLING MINING
Information Patent Grant
Movement detection circuit of solenoid shear seal valve on subsea p...
- Patent number 8,542,006
- Issue date Sep 24, 2013
- Hydril USA Manfacturing LLC
- Zhen Liu
- G01 - MEASURING TESTING

Patents Applicationslast 30 patents

Information Patent Application
SUBSEA SENSORS DISPLAY SYSTEM AND METHOD
- Publication number 20120273211
- Publication date Nov 1, 2012
- HYDRIL USA MANUFACTURING LLC
- Devasish CHOUDHURY
- E21 - EARTH DRILLING MINING
Information Patent Application
MOVEMENT DETECTION CIRCUIT OF SOLENOID SHEAR SEAL VALVE ON SUBSEA P...
- Publication number 20100148755
- Publication date Jun 17, 2010
- Zhen Liu
- E21 - EARTH DRILLING MINING