Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4366138 | Carbon black useful for pigment for black lacquers | Richard Engel, Gerhard Kuhner, Reinhold Reck, Hans Schaefer, Manfred Voll | 1982-12-28 |
| 4221772 | Carbon black for lacquers and pigments | Gerhard Kuhner, Lothar Rothbuhr, Hans Schafer | 1980-09-09 |
| 4197221 | Carbon black concentrate | Lutz Dworowy, Gunther Fuchs, Lothar Rothbuhr, Hans Schafer | 1980-04-08 |