Issued Patents 2004
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6798890 | Directional microphone assembly | Mead C. Killion, Timothy S. Monroe, Viorel Drambarean, Andrew J. Haapapuro, John S. French | 2004-09-28 |
| 6704423 | Hearing aid assembly having external directional microphone | C. Roger Anderson, John S. French | 2004-03-09 |
| 6694034 | Transmission detection and switch system for hearing improvement applications | Stephen D. Julstrom, Elmer V. Carlson, Norman P. Matzen, Willem Soede | 2004-02-17 |