Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4368183 | Process of producing concentrated sulfuric acid | Karl-Heinz Dorr, Hugo Grimm, Ulrich Sander, Franz Maier | 1983-01-11 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4368183 | Process of producing concentrated sulfuric acid | Karl-Heinz Dorr, Hugo Grimm, Ulrich Sander, Franz Maier | 1983-01-11 |