Susumu Murakami

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Sakai, JP

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Patents Grantslast 30 patents

Information Patent Grant
Tunnel excavation method
- Patent number 4,673,218
- Issue date Jun 16, 1987
- Okumura Corporation
- Susumu Murakami
- B28 - WORKING CEMENT, CLAY, OR STONE
Information Patent Grant
Method of and apparatus for building thin lining on tunnel
- Patent number 4,666,336
- Issue date May 19, 1987
- Okumura Corporation
- Susumu Murakami
- E21 - EARTH DRILLING MINING