Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11297401 | Method for testing a plurality of notification appliances connected to a bus system and notification appliance for conducting the test | Urs Kaestli, Marc Wenzler, Peter Hofer, Xue Song Shen | 2022-04-05 |
| 7699143 | Method of setting the floor associations of a plurality of operating units of an elevator installation | Erich Tschuemperlin, Philippe Henneau | 2010-04-20 |
| 4535515 | Draw-roll assembly | Kurt Wetter, Felix Graf | 1985-08-20 |