Issued Patents All Time
Showing 26–27 of 27 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5010193 | Preparation of phosphoric acid derivatives and intermediates | Fritz Maurer, Reinhard Lantzsch, Helmut Fiege | 1991-04-23 |
| 4929766 | Process are the preparation of p-hydroxy-benzaldehydes | Helmut Fiege | 1990-05-29 |