Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5193880 | Chair, in particular work or office chair | Siegfried Keusch | 1993-03-16 |
| 5100200 | Chair, in particular work or office chair | Siegfried Keusch | 1992-03-31 |
| 5071189 | Chair with adjustment feature | — | 1991-12-10 |
| 5023925 | Hot air hand welding device | Gunther Goll, Peter Vater, Siegfried Keusch | 1991-06-11 |