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Snow tiller with compactor pan
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Patent number 5,084,992
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Issue date Feb 4, 1992
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Logan Manufacturing Company
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William B. Sinykin
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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Snow grooming comb
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Patent number 4,897,941
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Issue date Feb 6, 1990
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Logan Manufacturing Company
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William B. Sinykin
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES