Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5360463 | Air filter assembly for heating or air-conditioning system | Thomas Dietterle | 1994-11-01 |
| 5078765 | Filter insert received exchangeably by a shaft along a channel | Wolfgang Volz, Klaus Arold, Helmut Merk, Heinz Koukal | 1992-01-07 |