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Coulter fertilizer tine
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Patent number 5,622,124
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Issue date Apr 22, 1997
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Unverferth Manufacturing Co., Inc.
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David R. Smith
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A01 - AGRICULTURE FORESTRY ANIMAL HUSBANDRY HUNTING TRAPPING FISHING
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Coulter chisel tillage tool
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Patent number 4,828,042
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Issue date May 9, 1989
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Unverferth Manufacturing Company, Inc.
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Loren G. Arnold
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A01 - AGRICULTURE FORESTRY ANIMAL HUSBANDRY HUNTING TRAPPING FISHING
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Multiple farm implement actuating system
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Patent number 4,615,396
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Issue date Oct 7, 1986
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Unverferth Manufacturing Company, Inc.
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Loren G. Arnold
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A01 - AGRICULTURE FORESTRY ANIMAL HUSBANDRY HUNTING TRAPPING FISHING