Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4839888 | Digital time-division multiplex switch-based telephone subscriber connection system | Rainier Baltz | 1989-06-13 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4839888 | Digital time-division multiplex switch-based telephone subscriber connection system | Rainier Baltz | 1989-06-13 |