| 8632275 |
Excavation machine with a pivotable kelly bar |
Laurent Pivert |
2014-01-21 |
| 8382397 |
Hydraulically-driven vibrating device for a vibratory compacting machine |
Daniel Perpezat, Laurent Pivert |
2013-02-26 |
| 8128178 |
Cutter head for a ground cutter machine having rotary cutters |
Laurent Pivert |
2012-03-06 |
| 8020323 |
Drilling tool |
Fabrice Mathieu, Daniel Perpezat, Jean-Claude Riglet |
2011-09-20 |
| 7765723 |
Cutter head for an excavator machine |
Jean-Claude Riglet |
2010-08-03 |
| 7591329 |
Auger with a movable gouge for making a borehole |
Daniel Perpezat, Régis Bernazinski, Lewis Stansfield |
2009-09-22 |
| 7591514 |
Cutter head for an excavator machine |
Jean-Claude Riglet |
2009-09-22 |
| 7114271 |
Cutting tool for digging trenches, and enabling the cutter head to be changed quickly |
Fabrice Mathieu |
2006-10-03 |
| 6839988 |
Drilling apparatus for hard ground |
Jean-Claude Gessay |
2005-01-11 |
| 4989824 |
Motor block fastening device for a trenching machine |
Jean-Claude Detilleux, Karl Bollinger, Jean-Pierre Schreiber, Andre Ponsada, Philippe Lefort |
1991-02-05 |
| 4971157 |
Apparatus for the removal of spoil when making trenches of great depth |
Karl Bollinger, Joseph Dietsch |
1990-11-20 |
| 4800967 |
Drilling machine for digging trenches in the ground |
Jean-Pierre Schreiber |
1989-01-31 |
| 4650012 |
Apparatus for cleaning drills |
Karl Bollinger |
1987-03-17 |