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Window frame for concrete wall panel
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Patent number 5,356,687
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Issue date Oct 18, 1994
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Kajima Corporation
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Tatsuo Suenaga
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E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
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Curtain wall
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Patent number 5,032,340
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Issue date Jul 16, 1991
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Kajima Corporation
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Shigeyuki Akihama
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B28 - WORKING CEMENT, CLAY, OR STONE
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Curtain wall
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Patent number 5,010,705
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Issue date Apr 30, 1991
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Kajima Corporation
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Shigeyuki Akihama
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B28 - WORKING CEMENT, CLAY, OR STONE
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