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Mold for concrete test cube
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Patent number 4,047,690
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Issue date Sep 13, 1977
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FORM-PLAST GmbH
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Wilhelm Winter
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B28 - WORKING CEMENT, CLAY, OR STONE
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3827666
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Patent number 3,827,666
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Issue date Aug 6, 1974
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B28 - WORKING CEMENT, CLAY, OR STONE
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3166817
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Patent number 3,166,817
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Issue date Jan 26, 1965
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B28 - WORKING CEMENT, CLAY, OR STONE
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3011657
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Patent number 3,011,657
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Issue date Dec 5, 1961
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B28 - WORKING CEMENT, CLAY, OR STONE
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2834088
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Patent number 2,834,088
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Issue date May 13, 1958
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B28 - WORKING CEMENT, CLAY, OR STONE
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2679083
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Patent number 2,679,083
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Issue date May 25, 1954
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B28 - WORKING CEMENT, CLAY, OR STONE
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2473748
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Patent number 2,473,748
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Issue date Jun 21, 1949
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B28 - WORKING CEMENT, CLAY, OR STONE
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2442685
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Patent number 2,442,685
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Issue date Jun 1, 1948
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B28 - WORKING CEMENT, CLAY, OR STONE
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2296562
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Patent number 2,296,562
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Issue date Sep 22, 1942
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B28 - WORKING CEMENT, CLAY, OR STONE
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1478746
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Patent number 1,478,746
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Issue date Dec 25, 1923
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B28 - WORKING CEMENT, CLAY, OR STONE
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1452665
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Patent number 1,452,665
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Issue date Apr 24, 1923
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B28 - WORKING CEMENT, CLAY, OR STONE
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1250212
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Patent number 1,250,212
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Issue date Dec 18, 1917
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B28 - WORKING CEMENT, CLAY, OR STONE
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1241228
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Patent number 1,241,228
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Issue date Sep 25, 1917
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B28 - WORKING CEMENT, CLAY, OR STONE
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1182944
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Patent number 1,182,944
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Issue date May 16, 1916
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B28 - WORKING CEMENT, CLAY, OR STONE
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1181032
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Patent number 1,181,032
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Issue date Apr 25, 1916
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B28 - WORKING CEMENT, CLAY, OR STONE
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1151309
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Patent number 1,151,309
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Issue date Aug 24, 1915
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B28 - WORKING CEMENT, CLAY, OR STONE
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1123586
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Patent number 1,123,586
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Issue date Jan 5, 1915
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B28 - WORKING CEMENT, CLAY, OR STONE
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1107479
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Patent number 1,107,479
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Issue date Aug 18, 1914
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B28 - WORKING CEMENT, CLAY, OR STONE
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1087481
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Patent number 1,087,481
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Issue date Feb 17, 1914
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B28 - WORKING CEMENT, CLAY, OR STONE
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1052688
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Patent number 1,052,688
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Issue date Feb 11, 1913
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B28 - WORKING CEMENT, CLAY, OR STONE
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1052571
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Patent number 1,052,571
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Issue date Feb 11, 1913
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B28 - WORKING CEMENT, CLAY, OR STONE
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1030754
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Patent number 1,030,754
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Issue date Jun 25, 1912
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B28 - WORKING CEMENT, CLAY, OR STONE
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1019250
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Patent number 1,019,250
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Issue date Mar 5, 1912
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B28 - WORKING CEMENT, CLAY, OR STONE
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975108
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Patent number 975,108
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Issue date Nov 8, 1910
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B28 - WORKING CEMENT, CLAY, OR STONE
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968048
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Patent number 968,048
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Issue date Aug 23, 1910
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B28 - WORKING CEMENT, CLAY, OR STONE
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958898
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Patent number 958,898
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Issue date May 24, 1910
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B28 - WORKING CEMENT, CLAY, OR STONE
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934320
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Patent number 934,320
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Issue date Sep 14, 1909
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B28 - WORKING CEMENT, CLAY, OR STONE
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932237
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Patent number 932,237
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Issue date Aug 24, 1909
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B28 - WORKING CEMENT, CLAY, OR STONE