Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6066190 | Combination of active ingredients for inhibiting or controlling nitrification | Margrit Grabarse, Hans-Jurgen Michel, Hartmut Wozniak | 2000-05-23 |
| 5951736 | Combinations of active ingredients for inhibiting or controlling nitrification | Margrit Grabarse, Hans-Jurgen Michel, Hartmut Wozniak | 1999-09-14 |
| 5741345 | Combination of active ingredients for inhibiting or controlling ammonia nitrification in arable topsoil and subsoil | Margrit Grabarse, Hans-Jurgen Michel, Hartmut Wozniak | 1998-04-21 |
| 5637131 | Agent combinations to inhibit or control nitrification of ammonia nitrogen in cultivated soils and substrates | Hans-Jurgen Michel, Hans J. Hartbrich, Margit Grabarse, Heinz Bohland, Klaus Mockel +1 more | 1997-06-10 |