Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4856050 | Telephone message retrieval system with improved message processor and retrieval console including auto-disabling playback switch | Gregory Buchberger | 1989-08-08 |
| 4800583 | Overflow call handling system | — | 1989-01-24 |