Tom Griffin

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Houston, TX, US

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Patents Grantslast 30 patents

Information Patent Grant
Drill string valve actuator with inflatable seals
- Patent number 8,694,298
- Issue date Apr 8, 2014
- Hydril USA Manufacturing LLC
- Leonard G. Childers
- Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC

Patents Applicationslast 30 patents

Information Patent Application
Drill String Valve Actuator with Inflatable Seals
- Publication number 20110209880
- Publication date Sep 1, 2011
- HYDRIL USA MANUFACTURING LLC
- Leonard G. Childers
- E21 - EARTH DRILLING MINING