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Double-glazing unit
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Patent number 6,472,032
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Issue date Oct 29, 2002
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Nippon Sheet Glass Co., Ltd.
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Osamu Asano
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E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
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Glass panel
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Patent number 6,436,493
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Issue date Aug 20, 2002
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Nippon Sheet Glass Co., Ltd.
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Osamu Asano
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E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
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Glass panel
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Patent number 6,387,460
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Issue date May 14, 2002
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Nippon Sheet Glass Co., Ltd.
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Kyoichi Shukuri
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E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS