Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4831649 | Method of routing calls for a network of digital time-switched exchanges | — | 1989-05-16 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4831649 | Method of routing calls for a network of digital time-switched exchanges | — | 1989-05-16 |