Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4362540 | Apparatus for removing dust particles from an air stream | — | 1982-12-07 |
| 4193778 | Device for removing dust-shaped particles from an air stream serving for the ventilation of mines | Alfred Zitz | 1980-03-18 |