Yoshio Koguchi

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Hitachiota, JP

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Patents Grantslast 30 patents

Information Patent Grant
Sintered body and electrode, method for surface densitication of th...
- Patent number 6,753,494
- Issue date Jun 22, 2004
- Hitachi, Ltd.
- Yohei Asakawa
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Vacuum circuit breaker as well as vacuum valve and electric contact...
- Patent number 6,048,216
- Issue date Apr 11, 2000
- Hitachi, Ltd.
- Katsuhiro Komuro
- B22 - CASTING POWDER METALLURGY
Information Patent Grant
Vacuum circuit breaker as well as vacuum valve and electric contact...
- Patent number 5,852,266
- Issue date Dec 22, 1998
- Hitachi, Ltd.
- Katsuhiro Komuro
- B22 - CASTING POWDER METALLURGY
Information Patent Grant
Method forming an electric contact in a vacuum circuit breaker
- Patent number 5,697,150
- Issue date Dec 16, 1997
- Hitachi, Ltd.
- Katsuhiro Komuro
- B22 - CASTING POWDER METALLURGY
Information Patent Grant
Vacuum circuit breaker and electric contact
- Patent number 5,557,083
- Issue date Sep 17, 1996
- Hitachi, Ltd.
- Katsuhiro Komuro
- B22 - CASTING POWDER METALLURGY

Patents Applicationslast 30 patents

Information Patent Application
Electrode for vacuum interrupter, vacuum interrupter using the same...
- Publication number 20040141271
- Publication date Jul 22, 2004
- Shigeru Kikuchi
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
Sintered body and electrode, method for surface densitication of th...
- Publication number 20030015500
- Publication date Jan 23, 2003
- Yohei Asakawa
- H01 - BASIC ELECTRIC ELEMENTS