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Green and cured concrete
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Patent number 5,381,780
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Issue date Jan 17, 1995
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Diamant Boart, Inc.
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Darrell A. Yelton
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B27 - WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL NAILING OR STAPLING MACH...
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Saw for green and cured concrete
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Patent number 5,241,946
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Issue date Sep 7, 1993
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Target Products, Inc.
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Darrell A. Yelton
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B27 - WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL NAILING OR STAPLING MACH...
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Blade shaft drive assembly
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Patent number 4,664,645
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Issue date May 12, 1987
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Federal-Mogul Corporation
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Wendell C. Muck
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B28 - WORKING CEMENT, CLAY, OR STONE