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3282507
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Patent number 3,282,507
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Issue date Nov 1, 1966
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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2522314
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Patent number 2,522,314
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Issue date Sep 12, 1950
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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2250785
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Patent number 2,250,785
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Issue date Jul 29, 1941
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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2243830
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Patent number 2,243,830
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Issue date Jun 3, 1941
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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1827630
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Patent number 1,827,630
-
Issue date Oct 13, 1931
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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1788820
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Patent number 1,788,820
-
Issue date Jan 13, 1931
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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1768967
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Patent number 1,768,967
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Issue date Jul 1, 1930
-
E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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1760275
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Patent number 1,760,275
-
Issue date May 27, 1930
-
E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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1690979
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Patent number 1,690,979
-
Issue date Nov 6, 1928
-
E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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1680669
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Patent number 1,680,669
-
Issue date Aug 14, 1928
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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1611748
-
Patent number 1,611,748
-
Issue date Dec 21, 1926
-
E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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1569806
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Patent number 1,569,806
-
Issue date Jan 12, 1926
-
E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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1556748
-
Patent number 1,556,748
-
Issue date Oct 13, 1925
-
E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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1524104
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Patent number 1,524,104
-
Issue date Jan 27, 1925
-
E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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1518472
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Patent number 1,518,472
-
Issue date Dec 9, 1924
-
E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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1505090
-
Patent number 1,505,090
-
Issue date Aug 19, 1924
-
E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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1428378
-
Patent number 1,428,378
-
Issue date Sep 5, 1922
-
E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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1420703
-
Patent number 1,420,703
-
Issue date Jun 27, 1922
-
E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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1417473
-
Patent number 1,417,473
-
Issue date May 23, 1922
-
E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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1405604
-
Patent number 1,405,604
-
Issue date Feb 7, 1922
-
E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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1401856
-
Patent number 1,401,856
-
Issue date Dec 27, 1921
-
E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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1382024
-
Patent number 1,382,024
-
Issue date Jun 21, 1921
-
E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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1356689
-
Patent number 1,356,689
-
Issue date Oct 26, 1920
-
E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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1345428
-
Patent number 1,345,428
-
Issue date Jul 6, 1920
-
E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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1328533
-
Patent number 1,328,533
-
Issue date Jan 20, 1920
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES