Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4190292 | Process for suppressing dust in mines | Harald Johannes, Hans Lewer, Dieter Poller | 1980-02-26 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4190292 | Process for suppressing dust in mines | Harald Johannes, Hans Lewer, Dieter Poller | 1980-02-26 |