Nicholas Peter Broom

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Patents Grantslast 30 patents

Information Patent Grant
Pressure balancing device
- Patent number 8,689,620
- Issue date Apr 8, 2014
- Sondex Wireline Limited
- James David Ratcliffe
- E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

Information Patent Application
PRESSURE BALANCING DEVICE
- Publication number 20110277545
- Publication date Nov 17, 2011
- James David RATCLIFFE
- E21 - EARTH DRILLING MINING