Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6318509 | Flexible elevator car dome to reduce noises from airflow | Jürg SPIELER, Alex Oberer | 2001-11-20 |
| 5636712 | Apparatus for driving a self-propelled elevator | Wolfgang Muller, Christoph Liebetrau, Utz Richter, Albrecht Morlok, Helmut Heizmann | 1997-06-10 |