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Shutter construction
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Patent number 4,435,920
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Issue date Mar 13, 1984
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RCA Corporation
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Susumu Osaka
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E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
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Shutter construction
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Patent number 4,427,048
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Issue date Jan 24, 1984
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RCA Corporation
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Susumu Osaka
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E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
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