Kouichi Shoji

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Nihonbashi-Muromachi, JA

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Patents Grantslast 30 patents

Information 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
Information 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