Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6309439 | Coated fertilizer granules | Karl Engelhardt, Eberhard Kleinbach, Michael Muller | 2001-10-30 |
| 6287359 | Granule mixtures composed of coated and non-coated fertilizer granules | Klaus Erhardt, Reinhardt Hahndel, Jurgen Dressel, Hans Lang | 2001-09-11 |
| 6187074 | Coated fertilizer granules | Karl Engelhardt, Eberhard Kleinbach, Michael Muller | 2001-02-13 |