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Window structure
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Patent number 4,447,985
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Issue date May 15, 1984
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Wausau Metals Corporation
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Ronald J. Weber
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E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
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Wall opening frame member
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Patent number 4,420,919
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Issue date Dec 20, 1983
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Wausau Metals Corporation
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Ronald J. Weber
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E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
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Thermal break ventilator unit
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Patent number 4,186,656
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Issue date Feb 5, 1980
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Wausau Metals Corporation
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Ronald J. Weber
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E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS