Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6490832 | Sliding door system | Stefan Fischbach, Josef Fuechtmann, Heinz Luithlen | 2002-12-10 |
| 4663800 | Holding device for door closers | Ralf Storandt, Georg Scheck | 1987-05-12 |
| 4653229 | Holding installation for double doors | Fritz Feucht, Ralf Storandt | 1987-03-31 |
| 4536916 | Door holder-closer having a control signal operated hold-open function and a mechanical override facility | Ralf Storandt | 1985-08-27 |