Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4877094 | Rock drilling machine, especially for underground mining | — | 1989-10-31 |
| 4800161 | Process for the microbiological preparation of aldose-1-epimerase | Harald Metz, Wolfgang Brummer, Günter Schmid, Ulrich Behrendt | 1989-01-24 |