Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6083263 | Adjustable hip-joint endoprosthesis | Klaus Draenert | 2000-07-04 |
| 6012553 | Mount for a lift cage safety device | Christoph Liebetrau, Albrecht Morlok | 2000-01-11 |
| 5769183 | Drive unit for a self-propelled elevator car | Utz Richter, Christoph Liebetrau, Albrecht Morlock, Helmut Heizmann | 1998-06-23 |
| 5713432 | Drive frame for a self-propelled elevator car | Utz Richter, Christoph Liebetrau, Albrecht Morlock, Helmut Heizmann | 1998-02-03 |