Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4862505 | Audiometer with interactive graphic display for children | William J. Keith, Michael S. Parsons, Russell P. Smith, Stephen F. Bell | 1989-08-29 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4862505 | Audiometer with interactive graphic display for children | William J. Keith, Michael S. Parsons, Russell P. Smith, Stephen F. Bell | 1989-08-29 |