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Screening apparatus
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Patent number 5,732,827
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Issue date Mar 31, 1998
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Portec Inc.
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John P. Dorscht
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B07 - SEPARATING SOLIDS FROM SOLIDS SORTING
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Hammers for hammer mills
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Patent number 5,484,111
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Issue date Jan 16, 1996
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Portec Inc.
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John P. Dorscht
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B02 - CRUSHING, PULVERISING, OR DISINTEGRATING PREPARATORY TREATMENT OF GRAIN...
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Tub grinder with screen portion
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Patent number 5,181,663
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Issue date Jan 26, 1993
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John P. Dorscht
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B02 - CRUSHING, PULVERISING, OR DISINTEGRATING PREPARATORY TREATMENT OF GRAIN...