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| Number | Title | Issue Date |
| 7011167 | Device for sealing a drill hole and for discharging drillings or stripped extraction material In a device for sealing a bore hole and discharging drill cuttings and stripped excavation material, including a housing adapted to receive sealing elements and an opening capable of being connected to the bore hole, one side wall of the housing is provided with at ... | 03/14/2006 |
| 5557979 | Gear box In a gearbox (1) with coaxial drive shaft (2) and driven shaft (3), wherein a clutch sleeve (5) which can be displaced in the axial direction (4) of these shafts (2,3) can be moved from a coupling position in which the drive shaft (2) and driven shaft (3)... | 09/24/1996 |
