Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5581941 | Vent and tilt roof window providing an exit | Wolfgang Radle, Harald Tomanek | 1996-12-10 |
| 5581942 | Method for the installation of a sash in the frame of a roof window | Siegfried Mullerbader | 1996-12-10 |