Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8731231 | Dynamic sound transducer and receiver | Till Teske-Fischer, Markus Kuhr, Vladimir Gorelik, Dirk Hackbarth, Heinz Epping +2 more | 2014-05-20 |
| 5949897 | Sound reproduction device with active noise compensation | Volker Bartels | 1999-09-07 |
| 5809156 | Sound reproduction device with active noise compensation | Volker Bartels | 1998-09-15 |