Issued Patents 2019
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10427912 | Elevator system | Holger Zerelles, Darrell Hertel | 2019-10-01 |
| 10308479 | Elevator installation | Holger Zerelles, Ronald Dietze, Juri Schäfer | 2019-06-04 |
| 10183842 | Elevator installation | Jörg Müller, Holger Zerelles, Ronald Dietze, Juri Schäfer | 2019-01-22 |