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Flexible rotary snow tiller
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Patent number 5,067,264
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Issue date Nov 26, 1991
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Logan Manufacturing Company
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Michael G. Beeley
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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Reversibly powered rotary snow tiller
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Patent number 4,359,831
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Issue date Nov 23, 1982
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De Lorean Manufacturing Company
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Michael G. Beeley
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES