Yasuo Okubo

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Chigasaki, JP

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Patents Grantslast 30 patents

Information Patent Grant
Earth discharge control system for small-diameter pipe propelling m...
- Patent number 5,707,176
- Issue date Jan 13, 1998
- Kabushiki Kaisha Komatsu Seisakusho
- Yasuo Okubo
- E21 - EARTH DRILLING MINING
Information Patent Grant
Pebble-stone crushing device for use in excavator for laying pipeli...
- Patent number 4,555,064
- Issue date Nov 26, 1985
- Kabushiki Kaisha Komatsu Seisakusho
- Juichi Asano
- E21 - EARTH DRILLING MINING