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Sleeve valve
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Patent number 4,011,886
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Issue date Mar 15, 1977
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Southwest Research Institute
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Charles D. Wood
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
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3924897
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Patent number 3,924,897
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Issue date Dec 9, 1975
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
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3887237
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Patent number 3,887,237
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Issue date Jun 3, 1975
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
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3880568
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Patent number 3,880,568
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Issue date Apr 29, 1975
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
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3787144
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Patent number 3,787,144
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Issue date Jan 22, 1974
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
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3752240
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Patent number 3,752,240
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Issue date Aug 14, 1973
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
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3713496
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Patent number 3,713,496
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Issue date Jan 30, 1973
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
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3619917
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Patent number 3,619,917
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Issue date Nov 16, 1971
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
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3600116
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Patent number 3,600,116
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Issue date Aug 17, 1971
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
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3574404
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Patent number 3,574,404
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Issue date Apr 13, 1971
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
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3541709
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Patent number 3,541,709
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Issue date Nov 24, 1970
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
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3461577
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Patent number 3,461,577
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Issue date Aug 19, 1969
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
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3401473
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Patent number 3,401,473
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Issue date Sep 17, 1968
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING