Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5558046 | Fire-tube boiler | Fritz Schoppe | 1996-09-24 |
| 5317979 | Method and apparatus for the complete, dry desulphurization of combustion waste gases comprising SO.sub.2 and dust | Fritz Schoppe | 1994-06-07 |