Hazel Farquhar

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Aberdeen, GB

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Patents Grantslast 30 patents

Information Patent Grant
Method of controlling flow through a drill string using a valve pos...
- Patent number 8,069,926
- Issue date Dec 6, 2011
- Andergauge Limited
- Alan Martyn Eddison
- Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC

Patents Applicationslast 30 patents

Information Patent Application
Valve
- Publication number 20100212912
- Publication date Aug 26, 2010
- Alan Martyn Eddison
- E21 - EARTH DRILLING MINING
Information Patent Application
Valve
- Publication number 20090032261
- Publication date Feb 5, 2009
- Alan Martyn Eddison
- E21 - EARTH DRILLING MINING