Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4880076 | Hearing aid ear piece having disposable compressible polymeric foam sleeve | Carl S. Ahlberg, Jerold W. Bushong, Robert J. Oliveira, Vasant V. Kolpe | 1989-11-14 |
| 4879621 | Disk restraint | Vurnen J. Leonard, Osamu Koizumi | 1989-11-07 |
| 4815600 | Storage container for diskettes | Gerald J. Niles, Carl S. Ahlberg | 1989-03-28 |