Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6788798 | Method and arrangement for improving leak tolerance of an earpiece | — | 2004-09-07 |
| 6717305 | Apparatus having an electroacoustic transducer forming a sound reproducing means and a part of vibration generating means | Ernst Ruberl, Heinz Renner | 2004-04-06 |