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Air fuel ratio sensory
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Patent number 5,580,440
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Issue date Dec 3, 1996
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Hitachi, Ltd.
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Sadayasu Ueno
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G01 - MEASURING TESTING
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Thermal air flow meter
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Patent number 4,559,814
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Issue date Dec 24, 1985
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Hitachi, Ltd.
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Kanemasa Sato
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G01 - MEASURING TESTING
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Air flow rate measuring apparatus
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Patent number 4,517,837
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Issue date May 21, 1985
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Hitachi, Ltd.
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Yoshishige Oyama
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F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
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Thermal air flow meter
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Patent number 4,513,615
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Issue date Apr 30, 1985
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Hitachi, Ltd.
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Kanemasa Sato
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F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
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Air flow rate measuring apparatus
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Patent number 4,393,697
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Issue date Jul 19, 1983
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Hitachi, Ltd.
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Kanemasa Sato
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F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
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Oxygen sensor
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Patent number 4,164,462
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Issue date Aug 14, 1979
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Hitachi, Ltd.
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Norio Ichikawa
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G01 - MEASURING TESTING