Shigehito Kaji

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Nagareyama, JP

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Patents Grantslast 30 patents

Information Patent Grant
Sardine-bone construction method for large-section tunnel
- Patent number 6,520,718
- Issue date Feb 18, 2003
- Shigeki Nagatomo, et al.
- Shigeki Nagatomo
- E21 - EARTH DRILLING MINING