Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5410593 | Method and device for displaying a hold service on multifunction telephone set and an exchange | — | 1995-04-25 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5410593 | Method and device for displaying a hold service on multifunction telephone set and an exchange | — | 1995-04-25 |