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3429126
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Patent number 3,429,126
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Issue date Feb 25, 1969
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
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2048252
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Patent number 2,048,252
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Issue date Jul 21, 1936
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
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2010778
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Patent number 2,010,778
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Issue date Aug 6, 1935
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
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1484816
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Patent number 1,484,816
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Issue date Feb 26, 1924
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING