Issued Patents 2005
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6920227 | Active noise suppression for a hearing aid device which can be worn in the ear or a hearing aid device with otoplastic which can be worn in the ear | Josef Chalupper, Uwe Rass | 2005-07-19 |