Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7779732 | Screwdriver handle provided with a blade tip storage chamber | Michael Abel, Ralf Richter, Werner Tretbar | 2010-08-24 |
| 7458296 | Screwing tool with interchangeable blade | Ralf Richter | 2008-12-02 |