Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4701221 | Process for the production of black pigments based on iron | Horst Brunn, Gerd-Hermann Schulten | 1987-10-20 |
| 4681637 | Process for the production of yellow-brown zinc ferrite pigments | Jakob Rademachers, Karlheinz Turban, Gerhard Franz, Bernd Holle | 1987-07-21 |