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Gas sensor
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Patent number 6,418,777
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Issue date Jul 16, 2002
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NGK Spark Plug Co., Ltd.
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Keiichi Noda
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G01 - MEASURING TESTING
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Gas sensor
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Patent number 6,327,891
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Issue date Dec 11, 2001
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NGK Spark Plug Co., Ltd.
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Keiichi Noda
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G01 - MEASURING TESTING
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Gas sensor
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Patent number 4,668,477
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Issue date May 26, 1987
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NGK Spark Plug Co., Ltd.
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Hisaharu Nishio
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G01 - MEASURING TESTING
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Oxygen sensor with heater
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Patent number 4,507,191
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Issue date Mar 26, 1985
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NGK Spark Plug Co., Ltd.
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Akio Ebizawa
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G01 - MEASURING TESTING