Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6557924 | Actuating system for a hatch or similar hinged structure | Andreas Ritter | 2003-05-06 |
| 6311813 | Axially movable switching sealing ring within a groove | Rolf Stumm | 2001-11-06 |
| 4932926 | Belt drive system | Klaus Ruffertshofer, Werner Rohrmoser, Hans-Dieter Pohlenz | 1990-06-12 |
| 4706333 | Gas springs with different active lengths to provide plural stable stopping positions | — | 1987-11-17 |
| 4692057 | Taper connection on a chair or table column of adjustable height | — | 1987-09-08 |
| 4632371 | Gas spring of variable spring force | Winfried Wirges, Willi Schafer | 1986-12-30 |