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Double point derail switch
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Patent number 9,932,054
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Issue date Apr 3, 2018
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Progress Rail Services Corporation
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Brian Weaver
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B61 - RAILWAYS
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Railway diamond crossing
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Patent number 7,793,891
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Issue date Sep 14, 2010
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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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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