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Material reducer
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Patent number 4,961,542
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Issue date Oct 9, 1990
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DenBesten; Leroy E.
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Todd Den Besten
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B02 - CRUSHING, PULVERISING, OR DISINTEGRATING PREPARATORY TREATMENT OF GRAIN...
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Bushing plate cutter
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Patent number 4,775,189
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Issue date Oct 4, 1988
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Leroy E. Den Besten
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
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Cutter bit device
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Patent number 4,684,176
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Issue date Aug 4, 1987
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Leroy E. Den Besten
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B28 - WORKING CEMENT, CLAY, OR STONE
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Mining block and bit
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Patent number 4,575,156
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Issue date Mar 11, 1986
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Fansteel Inc.
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David L. Hunter
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E21 - EARTH DRILLING MINING
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