Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5769183 | Drive unit for a self-propelled elevator car | Utz Richter, Christoph Liebetrau, Albrecht Morlock, Ortwin Piper | 1998-06-23 |
| 5713432 | Drive frame for a self-propelled elevator car | Utz Richter, Christoph Liebetrau, Albrecht Morlock, Ortwin Piper | 1998-02-03 |
| 5636712 | Apparatus for driving a self-propelled elevator | Wolfgang Muller, Christoph Liebetrau, Utz Richter, Jurgen Kastle, Albrecht Morlok | 1997-06-10 |
| 5022281 | Arrangement for preselecting and shifting a motor vehicle gear shift transmission | — | 1991-06-11 |