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Storm drain liner
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Patent number 6,554,997
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Issue date Apr 29, 2003
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Pactec, Inc.
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Michael R. Schilling
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E03 - WATER SUPPLY SEWERAGE
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Storm drain liner
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Patent number 6,306,293
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Issue date Oct 23, 2001
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Pactec, Inc.
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Michael R. Schilling
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E03 - WATER SUPPLY SEWERAGE
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Storm drain liner
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Patent number 6,086,758
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Issue date Jul 11, 2000
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Pactec, Inc.
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Michael R. Schilling
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E03 - WATER SUPPLY SEWERAGE