Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7467774 | Adjustable-height chair column | Helmut Kastner, Holger Knaust, Gerhard Wunderling | 2008-12-23 |
| 7152719 | Adjustable-length compression spring and seat provided therewith | Holger Knaust, Rainer Knapp | 2006-12-26 |
| 6234461 | Adjustable length gas spring | Frank Weisser | 2001-05-22 |
| 6224264 | Guide bush and adjustable length column with guide bush | Fred Bohm, Frank Weisser, Peter Lang | 2001-05-01 |
| 5620067 | Longitudinally adjustable gas spring with dual layered cylinder | Hans J. Bauer | 1997-04-15 |
| 4838159 | Lifting device for templates | — | 1989-06-13 |
| 4350573 | Halogenated aromatic amines which are stable in color, and a process for their preparation | Helmuth Kritzler, Ulrich Kappler, Hans D. Winkelmann | 1982-09-21 |