Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7775325 | Drive for an elevator installation and method of converting a drive in an elevator installation | Christoph Liebetrau | 2010-08-17 |
| 7665580 | Equipment for suspension of a car or counter weight in an elevator installation and methods for mounting and for maintenance of suspension means | Christoph Liebetrau, Miriam Schmid | 2010-02-23 |
| 7624847 | Drive for an elevator installation | Christoph Liebetrau | 2009-12-01 |
| 7398863 | Safety device for elevators | Christoph Liebetrau, Esben Rotboll | 2008-07-15 |