Yung-Sen Chou

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Houston, TX, US

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Patents Grantslast 30 patents

Information Patent Grant
Drilling riser centralizer
- Patent number 5,950,737
- Issue date Sep 14, 1999
- ABB Vetco Gray Inc.
- Yung-sen Chou
- E21 - EARTH DRILLING MINING
Information Patent Grant
Wellhead body lockdown and method for engaging same
- Patent number 4,697,828
- Issue date Oct 6, 1987
- Armco Inc.
- Yung-Sen Chou
- E21 - EARTH DRILLING MINING