Hironobu Yamazaki

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Kashiwa, JP

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Patents Grantslast 30 patents

Information Patent Grant
Excavation controlling method in hydraulic shield tunnelling
- Patent number 4,384,807
- Issue date May 24, 1983
- Tekken Construction Co., Ltd.
- Hironobu Yamazaki
- E21 - EARTH DRILLING MINING
Information Patent Grant
Shield type hydraulic tunnel boring machine
- Patent number 4,167,290
- Issue date Sep 11, 1979
- Tekken Construction Co. Ltd.
- Hironobu Yamazaki
- E21 - EARTH DRILLING MINING
Information Patent Grant
Device for removing gravels and the like from discharged mud in hyd...
- Patent number 4,116,487
- Issue date Sep 26, 1978
- Tekken Construction Co. Ltd.
- Hironobu Yamazaki
- E21 - EARTH DRILLING MINING