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Fluid mixing system
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Patent number 7,226,203
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Issue date Jun 5, 2007
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Schlumberger Technology Corporation
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Joel Rondeau
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B28 - WORKING CEMENT, CLAY, OR STONE
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Fluid mixing system
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Patent number 7,056,008
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Issue date Jun 6, 2006
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Schlumberger Technology Corporation
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Joel Rondeau
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B28 - WORKING CEMENT, CLAY, OR STONE
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Automated cement mixing system
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Patent number 6,786,629
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Issue date Sep 7, 2004
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Schlumberger Technology Corporation
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Joel Rondeau
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B28 - WORKING CEMENT, CLAY, OR STONE
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Concrete recovery system
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Patent number 6,682,655
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Issue date Jan 27, 2004
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Knelson Patents Inc.
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David James Beckham
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B28 - WORKING CEMENT, CLAY, OR STONE
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Fluid mixing system
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Patent number 6,491,421
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Issue date Dec 10, 2002
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Schlumberger Technology Corporation
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Joel Rondeau
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B28 - WORKING CEMENT, CLAY, OR STONE
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3888470
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Patent number 3,888,470
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Issue date Jun 10, 1975
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B28 - WORKING CEMENT, CLAY, OR STONE
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2954215
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Patent number 2,954,215
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Issue date Sep 27, 1960
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B28 - WORKING CEMENT, CLAY, OR STONE
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2013837
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Patent number 2,013,837
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Issue date Sep 10, 1935
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B28 - WORKING CEMENT, CLAY, OR STONE
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1980184
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Patent number 1,980,184
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Issue date Nov 13, 1934
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B28 - WORKING CEMENT, CLAY, OR STONE
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1898890
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Patent number 1,898,890
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Issue date Feb 21, 1933
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B28 - WORKING CEMENT, CLAY, OR STONE
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1730893
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Patent number 1,730,893
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Issue date Oct 8, 1929
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B28 - WORKING CEMENT, CLAY, OR STONE