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Daigorou Shiozawa
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Kitakatushika, JP
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Patents Grants
last 30 patents
Information
Patent Grant
Optical current transformer for gas-insulated apparatus
Patent number
9,116,176
Issue date
Aug 25, 2015
Hitachi, Ltd.
Wei Zhang
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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Patent Grant
Insulating spacer with built-in optical fiber
Patent number
8,847,084
Issue date
Sep 30, 2014
Hitachi, Ltd.
Wei Zhang
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Patents Applications
last 30 patents
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Patent Application
OPTICAL CURRENT TRANSFORMER FOR GAS-INSULATED APPARATUS
Publication number
20130093409
Publication date
Apr 18, 2013
Hitachi, Ltd
Wei Zhang
G01 - MEASURING TESTING
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Patent Application
Insulating Spacer with Built-In Optical Fiber
Publication number
20130025933
Publication date
Jan 31, 2013
Hitachi, Ltd
Wei Zhang
G01 - MEASURING TESTING