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Container concrete mixing plant
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Patent number 6,832,851
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Issue date Dec 21, 2004
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Walter-Heilit Verkehrswegebau GmbH
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Alexander von Wilcken
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B28 - WORKING CEMENT, CLAY, OR STONE
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Mixing apparatus
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Patent number 5,213,414
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Issue date May 25, 1993
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Baker Hughes Incorporated
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Bennett M. Richard
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B28 - WORKING CEMENT, CLAY, OR STONE
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Portable concrete batch plant
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Patent number 5,171,121
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Issue date Dec 15, 1992
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Concrete Equipment Company
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Neil C. Smith
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B28 - WORKING CEMENT, CLAY, OR STONE
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Concrete mixing system
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Patent number 4,075,711
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Issue date Feb 21, 1978
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U-Cart Concrete Systems, Inc.
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Jack F. Hall
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B28 - WORKING CEMENT, CLAY, OR STONE
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3506246
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Patent number 3,506,246
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Issue date Apr 14, 1970
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B28 - WORKING CEMENT, CLAY, OR STONE
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3208735
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Patent number 3,208,735
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Issue date Sep 28, 1965
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B28 - WORKING CEMENT, CLAY, OR STONE
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3142390
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Patent number 3,142,390
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Issue date Jul 28, 1964
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B28 - WORKING CEMENT, CLAY, OR STONE
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3112099
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Patent number 3,112,099
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Issue date Nov 26, 1963
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B28 - WORKING CEMENT, CLAY, OR STONE
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2416771
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Patent number 2,416,771
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Issue date Mar 4, 1947
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B28 - WORKING CEMENT, CLAY, OR STONE
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2269561
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Patent number 2,269,561
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Issue date Jan 13, 1942
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B28 - WORKING CEMENT, CLAY, OR STONE