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Method for preserving wooden cross-tie
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Patent number 5,236,711
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Issue date Aug 17, 1993
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Osmose Wood Preserving
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David J. Ostby
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B27 - WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL NAILING OR STAPLING MACH...
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Wood preserving pad
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Patent number 5,043,225
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Issue date Aug 27, 1991
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David J. Ostby
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B27 - WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL NAILING OR STAPLING MACH...
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3904113
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Patent number 3,904,113
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Issue date Sep 9, 1975
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B66 - HOISTING LIFTING HAULING
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3716608
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Patent number 3,716,608
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Issue date Feb 13, 1973
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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3576293
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Patent number 3,576,293
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Issue date Apr 27, 1971
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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3558060
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Patent number 3,558,060
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Issue date Jan 26, 1971
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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2457180
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Patent number 2,457,180
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Issue date Dec 28, 1948
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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2389015
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Patent number 2,389,015
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Issue date Nov 13, 1945
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D01 - NATURAL OR ARTIFICIAL THREADS OR FIBRES SPINNING
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2235777
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Patent number 2,235,777
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Issue date Mar 18, 1941
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES