Yoshihiro Kumaki

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Urawa, JP

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Patents Grantslast 30 patents

Information Patent Grant
Attitude control means of tunnel boring machine shield
- Patent number 4,142,763
- Issue date Mar 6, 1979
- Tekken Construction Co. Ltd.
- Yoshihiro Kumaki
- E21 - EARTH DRILLING MINING
Information Patent Grant
Method and system for performing attitude control of tunnel excavat...
- Patent number 4,111,486
- Issue date Sep 5, 1978
- Tekken Construction Co. Ltd.
- Yoshihiro Kumaki
- G01 - MEASURING TESTING