| 8294115 |
Linear electron source, evaporator using linear electron source, and applications of electron sources |
Volker Hacker, Hans-Georg Lotz |
2012-10-23 |
| 7928411 |
Linear electron source, evaporator using linear electron source, and applications of electron sources |
Volker Hacker, Hans-Georg Lotz |
2011-04-19 |
| 7550927 |
System and method for generating ions and radicals |
Michael W. Stowell, Hans-Georg Lotz, Volker Hacker |
2009-06-23 |
| 6568615 |
Hydraulic breaker |
— |
2003-05-27 |
| 6557652 |
Method for performing ground or rock work and hydraulic percussion device |
— |
2003-05-06 |
| 6290005 |
Pneumatic impact damping device for a drill column |
— |
2001-09-18 |
| 5431234 |
Ground-drilling device |
— |
1995-07-11 |
| 5419403 |
Pneumatic hammer |
— |
1995-05-30 |
| 5350023 |
Pneumatic hammer |
— |
1994-09-27 |
| 5269107 |
Mobile boring rig |
— |
1993-12-14 |
| 5255590 |
Control device for the load- dependent connection of a hydraulic stand by motor to a base-load motor |
— |
1993-10-26 |
