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Concrete
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Patent number 4,383,862
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Issue date May 17, 1983
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Domocon S.A.
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John M. Dyson
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B28 - WORKING CEMENT, CLAY, OR STONE
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3580551
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Patent number 3,580,551
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Issue date May 25, 1971
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B28 - WORKING CEMENT, CLAY, OR STONE
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3446487
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Patent number 3,446,487
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Issue date May 27, 1969
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B28 - WORKING CEMENT, CLAY, OR STONE
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3191914
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Patent number 3,191,914
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Issue date Jun 29, 1965
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B28 - WORKING CEMENT, CLAY, OR STONE
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3161405
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Patent number 3,161,405
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Issue date Dec 15, 1964
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B28 - WORKING CEMENT, CLAY, OR STONE
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3072388
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Patent number 3,072,388
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Issue date Jan 8, 1963
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B28 - WORKING CEMENT, CLAY, OR STONE
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1962960
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Patent number 1,962,960
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Issue date Jun 12, 1934
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B28 - WORKING CEMENT, CLAY, OR STONE
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1660280
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Patent number 1,660,280
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Issue date Feb 21, 1928
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B28 - WORKING CEMENT, CLAY, OR STONE
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1641347
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Patent number 1,641,347
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Issue date Sep 6, 1927
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B28 - WORKING CEMENT, CLAY, OR STONE
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1181153
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Patent number 1,181,153
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Issue date May 2, 1916
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B28 - WORKING CEMENT, CLAY, OR STONE
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1155190
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Patent number 1,155,190
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Issue date Sep 28, 1915
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B28 - WORKING CEMENT, CLAY, OR STONE
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1142841
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Patent number 1,142,841
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Issue date Jun 15, 1915
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B28 - WORKING CEMENT, CLAY, OR STONE
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1138397
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Patent number 1,138,397
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Issue date May 4, 1915
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B28 - WORKING CEMENT, CLAY, OR STONE
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1007689
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Patent number 1,007,689
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Issue date Nov 7, 1911
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B28 - WORKING CEMENT, CLAY, OR STONE