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Horizontal drilling machine
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Patent number 5,810,101
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Issue date Sep 22, 1998
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Engineering Crossing Systems, (Partnership)
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John Caraway
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
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Earth boring apparatus
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Patent number 4,417,628
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Issue date Nov 29, 1983
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Richard W. Gessner
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
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3033394
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Patent number 3,033,394
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Issue date May 8, 1962
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING