Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4862505 | Audiometer with interactive graphic display for children | William J. Keith, Michael S. Parsons, Christopher J. Glenn, Stephen F. Bell | 1989-08-29 |
| 4805979 | Fiber optic cable splice closure | Ronald G. Bossard, Dean C. Krenz | 1989-02-21 |