Issued Patents All Time
Showing 26–28 of 28 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5706352 | Adaptive gain and filtering circuit for a sound reproduction system | A. Maynard Engebretson | 1998-01-06 |
| 5412735 | Adaptive noise reduction circuit for a sound reproduction system | A. Maynard Engebretson | 1995-05-02 |
| 5016280 | Electronic filters, hearing aids and methods | A. Maynard Engebretson, Baohua Zheng | 1991-05-14 |