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Special trackwork assembly
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Patent number 10,487,456
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Issue date Nov 26, 2019
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Polycorp Ltd.
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Masoud Ansari
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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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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Flange bearing frog crossing
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Patent number 8,870,128
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Issue date Oct 28, 2014
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Cleveland Track Material, Inc.
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Daniel Voelkerding
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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Flange bearing frog crossing
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Patent number 8,870,129
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Issue date Oct 28, 2014
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Cleveland Track Material, Inc.
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Daniel Voelkerding
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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Grooved rail core piece
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Patent number 7,309,050
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Issue date Dec 18, 2007
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BWG GmbH & Co., KG
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Fridbert Heinze
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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Replaceable point frog
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Patent number 6,758,445
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Issue date Jul 6, 2004
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Vae Nortrak North America Inc.
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Gary Click
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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Railway frog wear component
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Patent number 6,732,980
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Issue date May 11, 2004
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Progress Rail Services Corp.
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Russell R. Hein
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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-
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Direct support frog assembly
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Patent number 5,653,408
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Issue date Aug 5, 1997
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ABC Rail Products Corporation
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Stephen R. Kuhn
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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Rail section
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Patent number 5,522,570
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Issue date Jun 4, 1996
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BWG Butzbacher Weichenbau GmbH
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Sebastian Benenowski
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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Railway switch heel block
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Patent number 4,283,030
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Issue date Aug 11, 1981
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Bethlehem Steel Corporation
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Frank P. Bobb
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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Railroad frogs
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Patent number 4,081,162
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Issue date Mar 28, 1978
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Abex Corporation
-
Earl E. Frank
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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3764802
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Patent number 3,764,802
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Issue date Oct 9, 1973
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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3755670
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Patent number 3,755,670
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Issue date Aug 28, 1973
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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3480072
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Patent number 3,480,072
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Issue date Nov 25, 1969
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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3395276
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Patent number 3,395,276
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Issue date Jul 30, 1968
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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3378683
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Patent number 3,378,683
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Issue date Apr 16, 1968
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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3263076
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Patent number 3,263,076
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Issue date Jul 26, 1966
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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3022968
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Patent number 3,022,968
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Issue date Feb 27, 1962
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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2853260
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Patent number 2,853,260
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Issue date Sep 23, 1958
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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2739772
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Patent number 2,739,772
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Issue date Mar 27, 1956
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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2427830
-
Patent number 2,427,830
-
Issue date Sep 23, 1947
-
E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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2335994
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Patent number 2,335,994
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Issue date Dec 7, 1943
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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2148940
-
Patent number 2,148,940
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Issue date Feb 28, 1939
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES