Andrew Bell

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Eastington, GB

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Patents Grantslast 30 patents

Information Patent Grant
Dual-edge working surfaces for polycrystalline diamond cutting elem...
- Patent number 7,568,534
- Issue date Aug 4, 2009
- ReedHycalog UK Limited
- Nigel Dennis Griffin
- E21 - EARTH DRILLING MINING
Information Patent Grant
Methods of manufacturing rotary drill bits
- Patent number 6,148,936
- Issue date Nov 21, 2000
- Camco International (UK) Limited
- Stephen Martin Evans
- B22 - CASTING POWDER METALLURGY

Patents Applicationslast 30 patents

Information Patent Application
Multi-Edge Working Surfaces for Polycrystalline Diamond Cutting Ele...
- Publication number 20080142267
- Publication date Jun 19, 2008
- ReedHycalog UK, Ltd.
- Nigel Dennis Griffin
- E21 - EARTH DRILLING MINING
Information Patent Application
Dual-Edge Working Surfaces for Polycrystalline Diamond Cutting Elem...
- Publication number 20080142275
- Publication date Jun 19, 2008
- Grant Prideco, L.P.
- Nigel Dennis Griffin
- E21 - EARTH DRILLING MINING
Information Patent Application
Dual-Edge Working Surfaces for Polycrystalline Diamond Cutting Elem...
- Publication number 20060086540
- Publication date Apr 27, 2006
- Nigel Dennis Griffin
- E21 - EARTH DRILLING MINING