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Environmental barrier device
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Patent number 7,901,160
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Issue date Mar 8, 2011
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Siltshield, LLC
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Mark D'Andreta
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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Environmental barrier device
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Patent number 7,736,097
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Issue date Jun 15, 2010
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M&D Environmental Barriers, LLP
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Mark D'Andreta
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES