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Helmut Dick
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Spiez, CH
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Patents Grants
last 30 patents
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Patent Grant
Tunnel boring machine
Patent number
5,104,261
Issue date
Apr 14, 1992
Atlas Copco Constructing and Mining Technique AB
Olov Anderson
E21 - EARTH DRILLING MINING
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Patent Grant
Tunnelling machine
Patent number
4,232,905
Issue date
Nov 11, 1980
Atlas Copco Aktiebolag
Helmut Dick
E21 - EARTH DRILLING MINING