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Blender apparatus
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Patent number 4,915,505
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Issue date Apr 10, 1990
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Geo Condor, Inc.
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Jorge O. Arribau
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B28 - WORKING CEMENT, CLAY, OR STONE
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Open inlet blender
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Patent number 4,460,276
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Issue date Jul 17, 1984
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Geo Condor, Inc.
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Jorge O. Arribau
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E21 - EARTH DRILLING MINING