Yuuichi Asai

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Patents Grantslast 30 patents

Information Patent Grant
Cutter structure for shield machine
- Patent number 6,915,864
- Issue date Jul 12, 2005
- Ishikawajima-Harima Heavy Industries Co., Ltd.
- Hiroyuki Itou
- E21 - EARTH DRILLING MINING
Information Patent Grant
Earth discharging device for upward-facing shield machine
- Patent number 6,698,844
- Issue date Mar 2, 2004
- Taisei Corporation
- Hiroyuki Itou
- E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

Information Patent Application
Earth discharging device for upward-facing shield machine
- Publication number 20030118408
- Publication date Jun 26, 2003
- Hiroyuki Itou
- E21 - EARTH DRILLING MINING
Information Patent Application
Cutter structure for shield machine
- Publication number 20030094311
- Publication date May 22, 2003
- Hiroyuki Itou
- E21 - EARTH DRILLING MINING