Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5085628 | Implantable hearing aid coupler device | A. Maynard Engebretson | 1992-02-04 |
| 4988333 | Implantable middle ear hearing aid system and acoustic coupler therefor | A. Maynard Engebretson | 1991-01-29 |