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Lightweight concrete masonry unit
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Patent number 6,311,444
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Issue date Nov 6, 2001
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Martin Limestone, Inc.
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John F. Sipe
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C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
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Antiblock agent for polyolefin films
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Patent number 5,908,890
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Issue date Jun 1, 1999
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CR Minerals Corporation
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Arlen C. Cornett
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C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
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3904377
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Patent number 3,904,377
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Issue date Sep 9, 1975
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C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
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3752685
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Patent number 3,752,685
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Issue date Aug 14, 1973
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C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
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3362837
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Patent number 3,362,837
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Issue date Jan 9, 1968
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C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
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2956891
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Patent number 2,956,891
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Issue date Oct 18, 1960
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C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
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1354233
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Patent number 1,354,233
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Issue date Sep 28, 1920
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C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES