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Horizontal boring apparatus
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Patent number 6,591,921
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Issue date Jul 15, 2003
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Terra AG fuer Tiefbautechnik
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Dietmar Jenne
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E21 - EARTH DRILLING MINING
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Ram device
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Patent number 6,588,315
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Issue date Jul 8, 2003
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Terra AG fuer Tiefbautechnik
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Dietmar Jenne
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E21 - EARTH DRILLING MINING
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-
-
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In Hole hammer
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Patent number 6,050,347
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Issue date Apr 18, 2000
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Terra Ag fuer Tiefbautechnik
-
Dietmar Jenne
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E21 - EARTH DRILLING MINING
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-
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Ram boring device
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Patent number 5,526,886
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Issue date Jun 18, 1996
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Terra Ag fuer Tiefbautechnik
-
Dietmar Jenne
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E21 - EARTH DRILLING MINING
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Earth boring device
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Patent number 5,492,184
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Issue date Feb 20, 1996
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Terra Ag fuer Tiefbautechnik
-
Dietmar Jenne
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E21 - EARTH DRILLING MINING
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-
-
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Percussion drill
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Patent number 5,050,686
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Issue date Sep 24, 1991
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Terra Ag fuer Tiefbautechnik
-
Dietmar Jenne
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E21 - EARTH DRILLING MINING
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76051055 - HYDROCRACK
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Serial number 76051055
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Registration number 2608651
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Filing date May 18, 2000
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TERRA AG fuer Tiefbautechnik
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7 - Machines and machine tools