Takayuki Yamakawa

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Ibaraki, JP

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Patents Grantslast 30 patents

Information Patent Grant
Hydraulic drive system for construction machine
- Patent number 5,488,787
- Issue date Feb 6, 1996
- Hitachi Construction Machinery Co., Ltd.
- Yukio Aoyagi
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING