Sachio Shimizu

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Tokyo, JP

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Patents Grantslast 30 patents

Information Patent Grant
Tunnel waterproofing method
- Patent number 6,793,441
- Issue date Sep 21, 2004
- W. R. Grace & Co.-Conn.
- Sachio Shimizu
- E21 - EARTH DRILLING MINING
Information Patent Grant
Tunnel waterproofing construction method
- Patent number 6,767,164
- Issue date Jul 27, 2004
- W. R. Grace & Co.-Conn.
- Sachio Shimizu
- E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

Information Patent Application
Tunnel waterproofing construction method
- Publication number 20030133756
- Publication date Jul 17, 2003
- Sachio Shimizu
- E21 - EARTH DRILLING MINING
Information Patent Application
Tunnel waterproofing method
- Publication number 20030129029
- Publication date Jul 10, 2003
- Sachio Shimizu
- E21 - EARTH DRILLING MINING