Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4820871 | Process for the preparation of N,N-diaryl-ureas | Joachim Franke, Helmut Fiege, Karlfried Wedemeyer | 1989-04-11 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4820871 | Process for the preparation of N,N-diaryl-ureas | Joachim Franke, Helmut Fiege, Karlfried Wedemeyer | 1989-04-11 |