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Dust collecting apparatus
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Patent number 5,593,471
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Issue date Jan 14, 1997
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NGK Insulators, Inc.
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Yoshiaki Hori
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B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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Exhaust emission control device
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Patent number 5,228,892
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Issue date Jul 20, 1993
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NGK Insulators, Ltd.
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Yasuo Akitsu
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F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
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Non-skid devices for tires
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Patent number 5,178,700
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Issue date Jan 12, 1993
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NGK Insulators, Ltd.
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Yasuo Akitsu
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B60 - VEHICLES IN GENERAL
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Vibro-isolating joint
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Patent number 4,958,860
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Issue date Sep 25, 1990
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NGK Insulators, Ltd.
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Yasuo Akitsu
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...