Denise John

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Cheltenham, Gloucestershire, GB

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Patents Grantslast 30 patents

Information Patent Grant
Drill bit
- Patent number 9,869,131
- Issue date Jan 16, 2018
- Nov Downhole Eurasia Limited
- Stephen Williams
- E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

Information Patent Application
Drill Bit
- Publication number 20150345228
- Publication date Dec 3, 2015
- NOV DOWNHOLE EURASIA LIMITED
- Stephen Williams
- E21 - EARTH DRILLING MINING