Yutaka Fujitsugu

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Patents Grantslast 30 patents

Information Patent Grant
Closed loop type proportional electromagnetic valve for hydraulic c...
- Patent number 4,669,504
- Issue date Jun 2, 1987
- Hitachi, Ltd.
- Yutaka Fujitsugu
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...