Stein Narvestad

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Oslo, NO

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Patents Grantslast 30 patents

Information Patent Grant
Cutter for tunnel boring machine
- Patent number 7,017,683
- Issue date Mar 28, 2006
- Stein Narvestad
- E21 - EARTH DRILLING MINING
Information Patent Grant
Ring clamp for a cutter ring in a tunnel drilling machine
- Patent number 5,341,889
- Issue date Aug 30, 1994
- Stein Narvestad A.S.
- Stein Narvestad
- E21 - EARTH DRILLING MINING
Information Patent Grant
Ring cutter for tunnel drilling in rock
- Patent number 5,253,723
- Issue date Oct 19, 1993
- Stein Narvestad
- E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

Information Patent Application
CUTTER FOR SHAFT AND/OR TUNNEL BORING
- Publication number 20150028657
- Publication date Jan 29, 2015
- Stein Narvestad AS
- Stein Narvestad
- E21 - EARTH DRILLING MINING
Information Patent Application
Cutter for tunnel boring machine
- Publication number 20040168833
- Publication date Sep 2, 2004
- Stein Narvestad
- E21 - EARTH DRILLING MINING