Yasuyuki Maeda

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Katsuta, JP

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Patents Grantslast 30 patents

Information Patent Grant
AC Elevator control system
- Patent number 4,441,584
- Issue date Apr 10, 1984
- Hitachi, Ltd.
- Nobuo Mitsui
- B66 - HOISTING LIFTING HAULING
Information Patent Grant
AC Elevator control system
- Patent number 4,319,665
- Issue date Mar 16, 1982
- Hitachi, Ltd.
- Katsu Komuro
- B66 - HOISTING LIFTING HAULING
Information Patent Grant
Three phase controlling system
- Patent number 4,101,819
- Issue date Jul 18, 1978
- Hitachi, Ltd.
- Yasuyuki Maeda
- G05 - CONTROLLING REGULATING