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Guardrail system
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Patent number 6,416,041
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Issue date Jul 9, 2002
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The Board of Regents of the University of Nebraska
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Dean Leo Sicking
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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Guardrail system
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Patent number 6,260,827
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Issue date Jul 17, 2001
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The Board of Regents of the University of Nebraska
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Dean Leo Sicking
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES