Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4818354 | Process for the preparation electrolytic manganese dioxide | Johannes Holzem, Gerhard Mietens, Gerhard Nolte | 1989-04-04 |
EP
Eberhard Preisler
Overall (1989): #118,414 of 140,708Top 85%
1
Patents 1989