Yamamoto; Minoru

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Patents Grantslast 30 patents

Information Patent Grant
Method for lining tunnel wall formed by shield excavation
- Patent number 4,863,313
- Issue date Sep 5, 1989
- Tekken Construction Co., Ltd.
- Minoru Yamamoto
- E21 - EARTH DRILLING MINING
Information Patent Grant
Method for constructing a tunnel
- Patent number 4,813,813
- Issue date Mar 21, 1989
- Yamamoto; Minoru
- Minoru Yamamoto
- E21 - EARTH DRILLING MINING
Information Patent Grant
Lining tunnel wall made by shield type tunnel excavator
- Patent number 4,786,206
- Issue date Nov 22, 1988
- Tekken Construction Co., Ltd.
- Minoru Yamamoto
- E21 - EARTH DRILLING MINING

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