Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10735850 | Loudspeaker | Stefan Größler, Robert Horbach, Martin Lorenz | 2020-08-04 |
| 10681456 | Bass reflex tube for a loudspeaker | Stefan Größler, Robert Horbach, Martin Lorenz, Thomas Wenzel | 2020-06-09 |