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Material-leveling apparatus
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Patent number 5,375,942
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Issue date Dec 27, 1994
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Lindley Incorporated
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Joseph Lindley
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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Concrete striking equipment
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Patent number 5,244,305
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Issue date Sep 14, 1993
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Thomas R. Lindley
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES