Issued Patents 2003
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6659205 | Rock drill | Hans-Werner Bongers-Ambrosius, Udo Hauptmann, Martin Richter | 2003-12-09 |
| 6655479 | Twist-drill bit | Hans-Werner Bongers-Ambrosius | 2003-12-02 |
| 6533047 | Suction tool | Hans-Werner Bongers-Ambrosius | 2003-03-18 |