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Fire door or window
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Patent number 6,668,499
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Issue date Dec 30, 2003
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DORMA GmbH + Co. KG
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Walter Degelsegger
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E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
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Fire rated door and fire rated window
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Patent number 6,606,831
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Issue date Aug 19, 2003
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Dorma GmbH + Co., KG
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Walter Degelsegger
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E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
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Fire wall
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Patent number 6,421,968
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Issue date Jul 23, 2002
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DORMA GmbH + Co. KG
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Walter Degelsegger
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A46 - BRUSHWARE