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Borehole cross-section steering
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Patent number 11,002,077
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Issue date May 11, 2021
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Schlumberger Technology Corporation
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Scott Woolston
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E21 - EARTH DRILLING MINING
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Multi-shaft drilling unit
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Patent number 5,797,465
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Issue date Aug 25, 1998
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Chemical Grouting Company, Ltd.
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Mitsuhiro Shibasaki
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
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Multi shaft drilling unit
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Patent number 5,575,345
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Issue date Nov 19, 1996
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Chemical Grouting Company. Ltd.
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Mitsuhiro Shibasaki
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
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Slitting cutter
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Patent number 5,267,902
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Issue date Dec 7, 1993
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Bauer Spezialtiefbau GmbH
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Maximilian Arzberger
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
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Pipe-laying apparatus
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Patent number 5,174,686
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Issue date Dec 29, 1992
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Gene Raymond
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
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Oscillating plow apparatus
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Patent number 5,067,853
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Issue date Nov 26, 1991
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Bernard Radnis
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
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Multi-shaft kneading auger system
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Patent number 5,050,320
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Issue date Sep 24, 1991
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Kajima Corporation
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Mitsuhiro Shibazaki
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
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Trench excavator
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Patent number 4,718,504
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Issue date Jan 12, 1988
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Tone Boring Co., Ltd.
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Tutomu Terashima
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
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Drilling machine
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Patent number 4,705,120
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Issue date Nov 10, 1987
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Turmag Turbo-Maschinen-AG, Nuesse & Graefer
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Wolfgang Ebeling
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E21 - EARTH DRILLING MINING
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Slotted wall milling cutter
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Patent number 4,694,915
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Issue date Sep 22, 1987
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Karl Bauer Spezialtiefbau GmbH & Co KG
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Karlheinz Bauer
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
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Rotatable drilling head
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Patent number 4,444,278
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Issue date Apr 24, 1984
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Frankie Rocchetti
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E21 - EARTH DRILLING MINING
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Rotatable drilling head
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Patent number 4,402,371
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Issue date Sep 6, 1983
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Frankie Rocchetti
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E21 - EARTH DRILLING MINING
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