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Universal concrete screed system
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Patent number 4,572,701
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Issue date Feb 25, 1986
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Consolidated Systems, Inc.
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Albert Parsons
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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Universal concrete screed system
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Patent number 4,428,556
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Issue date Jan 31, 1984
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Consolidated Systems, Inc.
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Albert Parsons
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES