Issued Patents 2003
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6671643 | Method for testing a hearing aid, and hearing aid operable according to the method | Manfred Kachler | 2003-12-30 |
| 6539096 | Method for producing a variable directional microphone characteristic and digital hearing aid operating according to the method | Ullrich Sigwanz | 2003-03-25 |