Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10141494 | Headset and headphone | Jan Peter Kuhtz, Martin Streitenberger, André Grandt, Hatem Foudhaili | 2018-11-27 |
| 9184474 | Rechargeable battery unit and portable electronic appliance | Dirk Reymann, Niels Christian Steen Hansen, Dirk Krätzer | 2015-11-10 |
| 8345916 | Electroacoustic sound transducer, receiver and microphone | Markus Kuhr | 2013-01-01 |
| 8180097 | Dynamic electro-acoustic transducer and earphone | Alwin Harms | 2012-05-15 |
| D626504 | Accumulator | Alexander Gruve, Dirk Krätzer, Christoph Greger | 2010-11-02 |
| 4352180 | Digital time-division multiplex telecommunication system | — | 1982-09-28 |