Hitoshi Okabe

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Hitachi-shi, JP

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Patents Grantslast 30 patents

Information Patent Grant
Vacuum circuit-breaker, vacuum bulb for use therein, and electrodes...
- Patent number 6,437,275
- Issue date Aug 20, 2002
- Hitachi, Ltd.
- Shigeru Kikuchi
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Vacuum circuit breaker, and vacuum bulb and vacuum bulb electrode u...
- Patent number 6,248,969
- Issue date Jun 19, 2001
- Hitachi, Ltd.
- Katsuhiro Komuro
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Electrode for vacuum circuit breaker
- Patent number 5,763,848
- Issue date Jun 9, 1998
- Hitachi, Ltd.
- Yoshimi Hakamata
- H01 - BASIC ELECTRIC ELEMENTS

Patents Applicationslast 30 patents

Information Patent Application
Vacuum circuit-breaker, vacuum valve for use therein, and electrode...
- Publication number 20020117476
- Publication date Aug 29, 2002
- Hitachi, Ltd.
- Shigeru Kikuchi
- H01 - BASIC ELECTRIC ELEMENTS