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Ishikawajima Construction Materials Co., Ltd.
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Tokyo, JP
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Patents Grants
last 30 patents
Information
Patent Grant
Jointing construction
Patent number
6,305,873
Issue date
Oct 23, 2001
Obayashi Corporation
Eiji Tauchi
E21 - EARTH DRILLING MINING
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Patent Grant
Segments
Patent number
6,076,995
Issue date
Jun 20, 2000
Obayashi Corporation
Eiji Tauchi
E21 - EARTH DRILLING MINING
Patents Applications
last 30 patents
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