Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4818354 | Process for the preparation electrolytic manganese dioxide | Eberhard Preisler, Johannes Holzem, Gerhard Nolte | 1989-04-04 |
GM
Gerhard Mietens
Overall (1989): #111,637 of 140,708Top 80%
1
Patents 1989