Issued Patents 2003
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6648079 | Protective apparatus for preventing the infiltration of contaminants in a fluid-operated percussion device | Markus Mellwig, Heinz-Jurgen Prokop | 2003-11-18 |
| 6510902 | Method and device for determining the operating time and the operating condition of a hydraulic percussion unit | Heinz-Jurgen Prokop, Marcus Geimer | 2003-01-28 |