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Asphalt loading safety system
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Patent number 6,006,796
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Issue date Dec 28, 1999
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Ashland Inc.
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Richard L Baker
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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3614397
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Patent number 3,614,397
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Issue date Oct 19, 1971
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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2873955
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Patent number 2,873,955
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Issue date Feb 17, 1959
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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2727733
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Patent number 2,727,733
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Issue date Dec 20, 1955
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B28 - WORKING CEMENT, CLAY, OR STONE
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2256422
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Patent number 2,256,422
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Issue date Sep 16, 1941
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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2232404
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Patent number 2,232,404
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Issue date Feb 18, 1941
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES