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Concrete roller head
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Patent number 8,979,520
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Issue date Mar 17, 2015
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Hawkeye Concrete Products Co.
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Claudio Subacchi
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B28 - WORKING CEMENT, CLAY, OR STONE
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Packerhead with elastic rollers
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Patent number 4,690,631
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Issue date Sep 1, 1987
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Hydrotile Machinery Company
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Michael L. Haddy
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B28 - WORKING CEMENT, CLAY, OR STONE
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3776677
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Patent number 3,776,677
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Issue date Dec 4, 1973
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B28 - WORKING CEMENT, CLAY, OR STONE
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3746494
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Patent number 3,746,494
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Issue date Jul 17, 1973
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B28 - WORKING CEMENT, CLAY, OR STONE
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3733163
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Patent number 3,733,163
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Issue date May 15, 1973
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B28 - WORKING CEMENT, CLAY, OR STONE
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3689967
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Patent number 3,689,967
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Issue date Sep 12, 1972
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B28 - WORKING CEMENT, CLAY, OR STONE
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3649727
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Patent number 3,649,727
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Issue date Mar 14, 1972
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B28 - WORKING CEMENT, CLAY, OR STONE
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3642413
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Patent number 3,642,413
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Issue date Feb 15, 1972
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B28 - WORKING CEMENT, CLAY, OR STONE