Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5724433 | Adaptive gain and filtering circuit for a sound reproduction system | Michael P. O'Connell | 1998-03-03 |
| 5706352 | Adaptive gain and filtering circuit for a sound reproduction system | Michael P. O'Connell | 1998-01-06 |
| 5475759 | Electronic filters, hearing aids and methods | — | 1995-12-12 |
| 5412735 | Adaptive noise reduction circuit for a sound reproduction system | Michael P. O'Connell | 1995-05-02 |
| 5357251 | Electronic filters, signal conversion apparatus, hearing aids and methods | Robert E. Morley, Jr., George L. Engel, Thomas J. Sullivan | 1994-10-18 |
| 5225836 | Electronic filters, repeated signal charge conversion apparatus, hearing aids and methods | Robert E. Morley, Jr., George L. Engel, Thomas J. Sullivan | 1993-07-06 |
| 5111419 | Electronic filters, signal conversion apparatus, hearing aids and methods | Robert E. Morley, Jr., George L. Engel, Thomas J. Sullivan | 1992-05-05 |
| 5085628 | Implantable hearing aid coupler device | John Fredrickson | 1992-02-04 |
| 5024224 | Method of readout of implanted hearing aid device and apparatus therefor | — | 1991-06-18 |
| 5016280 | Electronic filters, hearing aids and methods | Michael P. O'Connell, Baohua Zheng | 1991-05-14 |
| 4988333 | Implantable middle ear hearing aid system and acoustic coupler therefor | John Fredrickson | 1991-01-29 |
| 4548082 | Hearing aids, signal supplying apparatus, systems for compensating hearing deficiencies, and methods | Robert E. Morley, Jr., Gerald R. Popelka | 1985-10-22 |