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Lightweight cement panel
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Patent number 8,323,786
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Issue date Dec 4, 2012
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Kanaflex Corporation Inc.
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Shigeki Kanao
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B28 - WORKING CEMENT, CLAY, OR STONE
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3795721
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Patent number 3,795,721
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Issue date Mar 5, 1974
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B44 - DECORATIVE ARTS
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3708148
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Patent number 3,708,148
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Issue date Jan 2, 1973
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B28 - WORKING CEMENT, CLAY, OR STONE
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3600481
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Patent number 3,600,481
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Issue date Aug 17, 1971
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B28 - WORKING CEMENT, CLAY, OR STONE
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3578276
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Patent number 3,578,276
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Issue date May 11, 1971
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B28 - WORKING CEMENT, CLAY, OR STONE
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3491980
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Patent number 3,491,980
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Issue date Jan 27, 1970
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B28 - WORKING CEMENT, CLAY, OR STONE
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3442991
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Patent number 3,442,991
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Issue date May 6, 1969
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B28 - WORKING CEMENT, CLAY, OR STONE
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3298076
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Patent number 3,298,076
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Issue date Jan 17, 1967
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B28 - WORKING CEMENT, CLAY, OR STONE
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3217069
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Patent number 3,217,069
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Issue date Nov 9, 1965
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B28 - WORKING CEMENT, CLAY, OR STONE
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2770864
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Patent number 2,770,864
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Issue date Nov 20, 1956
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B28 - WORKING CEMENT, CLAY, OR STONE
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2674775
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Patent number 2,674,775
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Issue date Apr 13, 1954
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B28 - WORKING CEMENT, CLAY, OR STONE
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2270541
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Patent number 2,270,541
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Issue date Jan 20, 1942
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B28 - WORKING CEMENT, CLAY, OR STONE