Hiroyuki SHIRAI

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Tokyo, JP

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Patents Grantslast 30 patents

Information Patent Grant
Electrode for vacuum circuit breaker, and vacuum interrupter using...
- Patent number 9,208,960
- Issue date Dec 8, 2015
- Hitachi, Ltd.
- Kunihiko Tomiyasu
- H01 - BASIC ELECTRIC ELEMENTS

Patents Applicationslast 30 patents

Information Patent Application
Vacuum Switch
- Publication number 20150060409
- Publication date Mar 5, 2015
- Hitachi, Ltd
- Shinsuke Iitsuka
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
ELECTRODE FOR VACUUM CIRCUIT BREAKER, AND VACUUM INTERRUPTER USING...
- Publication number 20140367362
- Publication date Dec 18, 2014
- Hitachi, Ltd
- Kunihiko TOMIYASU
- H01 - BASIC ELECTRIC ELEMENTS