Yoshihisa Yamamoto

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Hirakata, JP

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Patents Grantslast 30 patents

Information Patent Grant
Articulated shield tunneling machine
- Patent number 5,135,326
- Issue date Aug 4, 1992
- Kabushiki Kaisha Komatsu Seisakusho
- Norio Mitani
- E21 - EARTH DRILLING MINING
Information Patent Grant
Apparatus for detecting position of underground excavator
- Patent number 5,107,938
- Issue date Apr 28, 1992
- Kabushiki Kaisha Komatsu Seisakusho Corporation
- Akira Okamoto
- E21 - EARTH DRILLING MINING