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Double frog for track crossings
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Patent number 9,487,920
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Issue date Nov 8, 2016
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VOESTALPINE WEICHENSYSTEME GMBH
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Alfred Lang
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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3757113
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Patent number 3,757,113
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Issue date Sep 4, 1973
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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2611076
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Patent number 2,611,076
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Issue date Sep 16, 1952
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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1807734
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Patent number 1,807,734
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Issue date Jun 2, 1931
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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1804095
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Patent number 1,804,095
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Issue date May 5, 1931
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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1794287
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Patent number 1,794,287
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Issue date Feb 24, 1931
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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1791867
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Patent number 1,791,867
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Issue date Feb 10, 1931
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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1687054
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Patent number 1,687,054
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Issue date Oct 9, 1928
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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1514206
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Patent number 1,514,206
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Issue date Nov 4, 1924
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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1469145
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Patent number 1,469,145
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Issue date Sep 25, 1923
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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1377216
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Patent number 1,377,216
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Issue date May 10, 1921
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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1109943
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Patent number 1,109,943
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Issue date Sep 8, 1914
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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928632
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Patent number 928,632
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Issue date Jul 20, 1909
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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822657
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Patent number 822,657
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Issue date Jun 5, 1906
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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803515
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Patent number 803,515
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Issue date Oct 31, 1905
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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736119
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Patent number 736,119
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Issue date Aug 11, 1903
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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560981
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Patent number 560,981
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Issue date May 26, 1896
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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522568
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Patent number 522,568
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Issue date Jul 3, 1894
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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509128
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Patent number 509,128
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Issue date Nov 21, 1893
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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431514
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Patent number 431,514
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Issue date Jul 1, 1890
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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410560
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Patent number 410,560
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Issue date Sep 3, 1889
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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409538
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Patent number 409,538
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Issue date Aug 20, 1889
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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409537
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Patent number 409,537
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Issue date Aug 20, 1889
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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390999
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Patent number 390,999
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Issue date Oct 9, 1888
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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374099
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Patent number 374,099
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Issue date Nov 29, 1887
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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333901
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Patent number 333,901
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Issue date Jan 5, 1886
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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280215
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Patent number 280,215
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Issue date Jun 26, 1883
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES