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Track sledding machine
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Patent number 7,316,084
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Issue date Jan 8, 2008
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Queensland Rail
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John Phillip Allen
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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Roller rail clamp
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Patent number 6,832,559
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Issue date Dec 21, 2004
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Queensland Rail
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John Phillip Allen
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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