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Composite masonry block
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Patent number 6,113,318
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Issue date Sep 5, 2000
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Anchor Wall Systems, Inc.
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Theodore E. Guth
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B28 - WORKING CEMENT, CLAY, OR STONE
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Composite masonry block
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Patent number 5,795,105
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Issue date Aug 18, 1998
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Anchor Wall Systems, Inc.
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Theodore E. Guth
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B28 - WORKING CEMENT, CLAY, OR STONE