Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6574342 | Hearing aid fitting system | Keith L. Davis, Xiaoling Fang, Douglas M. Chabries | 2003-06-03 |
| 6201875 | Hearing aid fitting system | Keith L. Davis, Xiaoling Fang, Douglas M. Chabries | 2001-03-13 |