Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6816601 | Microphone and battery configuration for hearing instruments | Shin Chai Mark Lin | 2004-11-09 |
| 6681021 | Directional ITE hearing aid using dual-input microphone | — | 2004-01-20 |