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Universal slide-plate
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Patent number 10,106,933
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Issue date Oct 23, 2018
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Narstco, Inc.
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Sean Keightley
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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Stacked railway tie
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Patent number 7,731,099
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Issue date Jun 8, 2010
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Narstco, Inc.
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Sean Keightley
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES