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Roller screen unit
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Patent number 5,176,194
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Issue date Jan 5, 1993
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Metaco Co., Ltd.
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Tomomichi Chigusa
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E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
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Roller screen unit
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Patent number 5,099,906
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Issue date Mar 31, 1992
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Metaco Co., Ltd.
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Tomomichi Chigusa
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E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS