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Automatic dumping hopper
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Patent number 5,323,939
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Issue date Jun 28, 1994
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Young Brothers, Inc.
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Francis M. Young
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B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
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Rotary drier
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Patent number 5,052,809
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Issue date Oct 1, 1991
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Young Brothers, Inc.
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Francis M. Young
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES