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3640075
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Patent number 3,640,075
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Issue date Feb 8, 1972
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
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3106068
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Patent number 3,106,068
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Issue date Oct 8, 1963
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
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2587835
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Patent number 2,587,835
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Issue date Mar 4, 1952
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
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2580017
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Patent number 2,580,017
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Issue date Dec 25, 1951
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
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1971046
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Patent number 1,971,046
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Issue date Aug 21, 1934
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
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1960080
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Patent number 1,960,080
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Issue date May 22, 1934
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
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1894206
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Patent number 1,894,206
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Issue date Jan 10, 1933
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING