Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6336451 | Process and device for confining, retaining and sucking off fumes, dust or the like | Georg Koppenwallner | 2002-01-08 |
| 5050581 | Process and device for drawing off vapors and fumes | Georg Koppenwallner | 1991-09-24 |