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Post and panel wall
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Patent number 4,529,174
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Issue date Jul 16, 1985
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The Reinforced Earth Company
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William H. Pickett
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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Noise barrier
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Patent number 4,138,947
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Issue date Feb 13, 1979
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William H. Pickett
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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Construction assemblies
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Patent number 4,111,401
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Issue date Sep 5, 1978
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William Hayden Pickett
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES