Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8157901 | Apparatus for purifying air, in particular for ventilation and air-conditioning systems | Kurt Tiefenauer, Beat Ernst | 2012-04-17 |
| 5320655 | Incineratable holding frame for filter bags, and method of making the frame | — | 1994-06-14 |