Issued Patents 1994
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5357251 | Electronic filters, signal conversion apparatus, hearing aids and methods | A. Maynard Engebretson, George L. Engel, Thomas J. Sullivan | 1994-10-18 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5357251 | Electronic filters, signal conversion apparatus, hearing aids and methods | A. Maynard Engebretson, George L. Engel, Thomas J. Sullivan | 1994-10-18 |