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Spark plug
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Patent number 11,183,819
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Issue date Nov 23, 2021
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NGK Spark Plug Co., Ltd.
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Yutaka Yokoyama
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H01 - BASIC ELECTRIC ELEMENTS
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Spark plug
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Patent number 9,912,125
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Issue date Mar 6, 2018
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NGK Spark Plug Co., Ltd.
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Haruki Yoshida
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H01 - BASIC ELECTRIC ELEMENTS
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Spark plug
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Patent number 9,755,404
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Issue date Sep 5, 2017
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NGK Spark Plug Co., Ltd.
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Jumpei Isasa
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H01 - BASIC ELECTRIC ELEMENTS
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Spark plug
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Patent number 9,653,888
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Issue date May 16, 2017
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NGK Spark Plug Co., Ltd.
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Yutaka Yokoyama
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H01 - BASIC ELECTRIC ELEMENTS