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Exterior window unit having frame header
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Patent number 4,055,916
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Issue date Nov 1, 1977
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Yoshida Kogyo Kabushiki Kaisha
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Yukio Yamamoto
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E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
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Ventilator
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Patent number 4,027,581
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Issue date Jun 7, 1977
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Yoshida Kogyo Kabushiki Kaisha
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Yukio Yamamoto
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F24 - HEATING RANGES VENTILATING
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Paneled door construction
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Patent number 4,014,149
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Issue date Mar 29, 1977
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Yoshida Kogyo Kabushiki Kaisha
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Yukio Yamamoto
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E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
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