Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4809262 | Method of making conference call connections in computer-controlled digital telephone exchanges | Reinhard Klose | 1989-02-28 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4809262 | Method of making conference call connections in computer-controlled digital telephone exchanges | Reinhard Klose | 1989-02-28 |