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Honeycomb structure
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Patent number 11,339,099
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Issue date May 24, 2022
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NGK Insulators, Ltd.
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Nobuyuki Kashiwagi
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C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
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Extrusion-forming device
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Patent number 9,174,357
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Issue date Nov 3, 2015
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NGK Insulators, Ltd.
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Yasunori Yamazaki
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B28 - WORKING CEMENT, CLAY, OR STONE
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Twin-screw extruder
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Patent number 7,594,807
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Issue date Sep 29, 2009
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NGK Insulators, Inc.
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Yasunori Yamazaki
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL