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Negative pressure control valve
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Patent number 4,598,729
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Issue date Jul 8, 1986
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Nippondenso Co., Ltd.
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Mitikatu Naito
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F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
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Vacuum control valve
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Patent number 4,440,139
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Issue date Apr 3, 1984
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Nippondenso Co., Ltd.
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Mitikatu Naito
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F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
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Vacuum control valve
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Patent number 4,416,243
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Issue date Nov 22, 1983
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Nippondenso Co., Ltd.
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Mitikatu Naito
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F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS