Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8469340 | Foot device for supporting a support device or lifting device | Holger Birkholz, Ralf Natterer, Gerhard Trunk | 2013-06-25 |
| 8408522 | Lifting device | Holger Birkholz, Werner Dölger, Ralf Natterer | 2013-04-02 |
| 8388023 | Lifting device | Holger Birkholz, Konrad Lazarus, Ralf Natterer | 2013-03-05 |