Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9636259 | Water resistant acoustic port in ear-mouthed hearing device | Paul D. Henry, David M. Lutgring | 2017-05-02 |
| 5550923 | Directional ear device with adaptive bandwidth and gain control | — | 1996-08-27 |
| 4827525 | Attachment device for a probe microphone | Ernest L. Woodfill, Rolf C. Rising | 1989-05-02 |
| 4718099 | Automatic gain control for hearing aid | — | 1988-01-05 |