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Obu, JP
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Patents Grants
last 30 patents
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Patent Grant
Spark plug
Patent number
9,608,411
Issue date
Mar 28, 2017
NGK Spark Plug Co., Ltd.
Hidetaka Hisada
H01 - BASIC ELECTRIC ELEMENTS
Patents Applications
last 30 patents
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Patent Application
SPARK PLUG
Publication number
20160285240
Publication date
Sep 29, 2016
NGK Spark Plug Co., Ltd.
Hidetaka HISADA
H01 - BASIC ELECTRIC ELEMENTS