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Kouichi Shoji
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Nihonbashi-Muromachi, JA
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last 30 patents
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Patent Grant
Process for hydraulically mining coal employing a cutting monitor a...
Patent number
4,094,549
Issue date
Jun 13, 1978
Kaiser Resources Ltd.
Kouichi Shoji
E21 - EARTH DRILLING MINING
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Patent Grant
Process for hydraulically mining coal
Patent number
4,012,076
Issue date
Mar 15, 1977
Kaiser Resources Ltd.
Kouichi Shoji
E21 - EARTH DRILLING MINING