Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4867794 | Process for preparing rutile-coated mica pigments | Klaus Ambrosius, August Knapp, Reiner Esselborn | 1989-09-19 |
HP
Helmut Plamper
Overall (1989): #137,546 of 140,708Top 100%
1
Patents 1989