Issued Patents All Time
Showing 1–16 of 16 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12385309 | Linkage for a door actuator | Sabine Wiemann, Alexander Hellwig | 2025-08-12 |
| 12146357 | Fire protection securing device for securing a door actuator | Thomas Pabst, Alexander Hellwig, Volker Bienek | 2024-11-19 |
| 12049782 | Backplate for a door actuator | Alexander Hellwig, Konstantin Lygin, Volker Bienek | 2024-07-30 |
| 11814888 | Fire protection fastening device for fastening a door actuator | Alexander Hellwig, Sabine Wiemann, Volker Bienek | 2023-11-14 |
| 11725445 | Backplate for a door actuator | Alexander Hellwig, Sabine Wiemann | 2023-08-15 |
| 11578522 | Door actuator for opening and/or closing a door | Alexander Hellwig, Sabine Weimann | 2023-02-14 |
| 11242705 | Door actuator | Sabiene Wiemann | 2022-02-08 |
| 10006236 | Door drive | Alexander Hellwig, Volker Bienek, Thomas Wildförster | 2018-06-26 |
| 9631412 | Door actuator | Alexander Hellwig, Sabine Wiemann | 2017-04-25 |
| 9501047 | Servo door-closer | Wolfgang Semelka, Felix Böse | 2016-11-22 |
| 9181744 | Door actuator | Alexander Hellwig, Jan Meulenbeld | 2015-11-10 |
| 9045926 | Door closer having a magnetic distribution valve | Volker Bienek | 2015-06-02 |
| 8875344 | Door closer | Volker Bienek, Thomas Wildförster, Thomas Pabst, Sabine Wiemann | 2014-11-04 |
| 7815023 | Drive device for opening or closing a door or similar | — | 2010-10-19 |
| 6151753 | Door closer to generate a sudden change in the transmission ratio during the closing phase | — | 2000-11-28 |
| 5862630 | Door closer | Peter Krumhauer | 1999-01-26 |