Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4851160 | Process for the preparation of benzoic acid derivatives | Uwe Petersen, Michael Schriewer, Klaus Grohe | 1989-07-25 |
| 4806147 | Substituted 1-benzylsulphonyl-3-heteroaryl-(thio)urea herbicides | Christa Fest, Klaus-Helmut Muller, Theodor Pfister, Hans-Jochem Riebel, Hans-Joachim Santel +2 more | 1989-02-21 |