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Drilling device and drilling method
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Patent number 8,579,048
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Issue date Nov 12, 2013
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Bauer Maschinen GmbH
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Leonhard Weixler
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
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Hollow screw-in pile
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Patent number 6,142,712
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Issue date Nov 7, 2000
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Richard White
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
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3839872
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Patent number 3,839,872
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Issue date Oct 8, 1974
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
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3738115
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Patent number 3,738,115
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Issue date Jun 12, 1973
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
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3646947
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Patent number 3,646,947
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Issue date Mar 7, 1972
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
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3597930
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Patent number 3,597,930
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Issue date Aug 10, 1971
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
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3137140
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Patent number 3,137,140
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Issue date Jun 16, 1964
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
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1706002
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Patent number 1,706,002
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Issue date Mar 19, 1929
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
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1591165
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Patent number 1,591,165
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Issue date Jul 6, 1926
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
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1360986
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Patent number 1,360,986
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Issue date Nov 30, 1920
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING