Issued Patents 2003
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6626627 | Screw with tamper-proof head | Helmut Oesterle, Norbert Koeppel, Peter Kouwenhoven | 2003-09-30 |
| 6539826 | Screwing element | Helmut Oesterle, Norbert Koeppel, Peter Kouwenhoven | 2003-04-01 |