Issued Patents All Time
Showing 26–27 of 27 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4525197 | Fertilizer | Robert Eibner, Hans-Heinrich Nolle, Wilhelm Kohl | 1985-06-25 |
| 4499461 | Circuit arrangement for centrally-controlled telecommunication exchange systems, particularly for time-division multiplex telephone exchange systems, with information exchange between PBX devices | — | 1985-02-12 |