Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7455367 | Longwall support control for controlling the movements of longwall support units in the longwall of a mine | Ursula Kellermann, Christian Kellermann | 2008-11-25 |
| 7416369 | Timbering and walling control for controlling the movements of timbering and walling units in the coal face of a mine | Ursula Kellermann, Christian Kellermann | 2008-08-26 |