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Reinforced cementitious shear panels
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Patent number 8,065,853
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Issue date Nov 29, 2011
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U.S. Gypsum Company
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Timothy D. Tonyan
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C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
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Cement based laminated armor panels
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Patent number 8,062,741
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Issue date Nov 22, 2011
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U.S. Gypsum Company
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Timothy D. Tonyan
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C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
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Doorframe construction
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Patent number 4,281,480
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Issue date Aug 4, 1981
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U.S. Gypsum Company
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Alan C. Wendt
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E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS