Yoshiharu Yotsumoto

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Tokyo, JP

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Patents Grantslast 30 patents

Information Patent Grant
Vacuum exhaust element of vacuum switch
- Patent number 6,495,786
- Issue date Dec 17, 2002
- Hitachi, Ltd.
- Masashige Tsuji
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Bellows and vacuum switch using the bellows
- Patent number 6,114,647
- Issue date Sep 5, 2000
- Hitachi, Ltd.
- Ayumu Morita
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Semiconductor rectifier device
- Patent number 4,604,643
- Issue date Aug 5, 1986
- Tokyo Shibaura Denki Kabushiki Kaisha
- Yoshiharu Yotsumoto
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER