Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5673348 | Apparatus for adjustment, attenuating device, coupling device and filtering device | Rolf Steiner | 1997-09-30 |
| 5667582 | Method for dry desulfurizing flue gases | Helmut Erhard | 1997-09-16 |