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Grinding mill apparatus
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Patent number 4,919,344
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Issue date Apr 24, 1990
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Robert T. McKie
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B02 - CRUSHING, PULVERISING, OR DISINTEGRATING PREPARATORY TREATMENT OF GRAIN...
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Hydraulic carriage drive system
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Patent number 4,539,814
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Issue date Sep 10, 1985
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Robert T. McKie
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B27 - WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL NAILING OR STAPLING MACH...
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Car repair apparatus
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Patent number 4,295,427
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Issue date Oct 20, 1981
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Morrison-Knudsen Co., Inc.
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Fred W. Waterman
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B66 - HOISTING LIFTING HAULING