Issued Patents 1982
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4309765 | Process for transmitting items of information between devices of an indirectly controlled exchange system, in particular a telephone exchange system | Helmut Mueller, Thomas Rambold, Bernhard Werres | 1982-01-05 |