Shigeru Kobayashi

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Tokyo, JA

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Patents Grantslast 30 patents

Information Patent Grant
Automatic tunnel face hydraulic pressure controlling apparatus in s...
- Patent number 4,068,484
- Issue date Jan 17, 1978
- Tekken Construction Co., Ltd.
- Yasuyuki Iwamitu
- E21 - EARTH DRILLING MINING
Information Patent Grant
Method and apparatus of completing slurry shield tunneling at verti...
- Patent number 4,052,859
- Issue date Oct 11, 1977
- Tekken Construction Co. Ltd.
- Yasuyuki Iwamitsu
- E21 - EARTH DRILLING MINING