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Flood washing system
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Patent number 5,562,249
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Issue date Oct 8, 1996
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Stephen G. Trotter
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B08 - CLEANING
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3540655
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Patent number 3,540,655
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Issue date Nov 17, 1970
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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2278976
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Patent number 2,278,976
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Issue date Apr 7, 1942
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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802772
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Patent number 802,772
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Issue date Oct 24, 1905
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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789588
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Patent number 789,588
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Issue date May 9, 1905
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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479979
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Patent number 479,979
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Issue date Aug 2, 1892
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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218024
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Patent number 218,024
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Issue date Jul 29, 1879
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES