Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10006236 | Door drive | Alexander Hellwig, Volker Bienek, Thomas Salutzki | 2018-06-26 |
| 9297194 | Hydraulic solenoid distribution valve | Volker Bienek | 2016-03-29 |
| 9187942 | Hydraulic directional solenoid valve and door closer having a hydraulic directional solenoid valve | — | 2015-11-17 |
| 8875344 | Door closer | Thomas Salutzki, Volker Bienek, Thomas Pabst, Sabine Wiemann | 2014-11-04 |
| 8695277 | Door actuator | Martin Römer, Michael Hufen, Holger Hänsch, Matthias Drux, Michael Glanz +1 more | 2014-04-15 |
| 8601744 | Door actuator with an actuator unit | Michael Hufen, Matthias Drux | 2013-12-10 |