Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5661814 | Hearing aid apparatus | Pius Gerold Estermann, Bohumir Uvacek | 1997-08-26 |
| 5633863 | Echo canceler | Peter Gysel, Bruno Wenger, Daniel Muller | 1997-05-27 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5661814 | Hearing aid apparatus | Pius Gerold Estermann, Bohumir Uvacek | 1997-08-26 |
| 5633863 | Echo canceler | Peter Gysel, Bruno Wenger, Daniel Muller | 1997-05-27 |