Nobuyuki Mori

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Itami-shi, JP

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Patents Grantslast 30 patents

Information Patent Grant
Insert chip of oil-drilling tricone bit, manufacturing method there...
- Patent number 6,719,074
- Issue date Apr 13, 2004
- Japan National Oil Corporation
- Keiichi Tsuda
- E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

Information Patent Application
Insert chip of oil-drilling tricone bit, manufacturing method there...
- Publication number 20030051924
- Publication date Mar 20, 2003
- Keiichi Tsuda
- E21 - EARTH DRILLING MINING