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Filter element
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Patent number 5,720,790
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Issue date Feb 24, 1998
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Denso Corporation
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Kazuo Kometani
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F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
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Automobile filter element
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Patent number 5,674,302
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Issue date Oct 7, 1997
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Nippondenso Co., Ltd.
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Toshiaki Nakayama
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F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
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Filter element manufacturing method
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Patent number 5,543,007
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Issue date Aug 6, 1996
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Nippondenso Co. Ltd.
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Takanari Takagaki
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B31 - MAKING ARTICLES OF PAPER OR CARDBOARD WORKING PAPER OR CARDBOARD
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