Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11060568 | Return stop | Alexander Reimchen, Stefan Hofmann | 2021-07-13 |
| 9115771 | Flanged freewheel | Swen Doerrie | 2015-08-25 |
| 8459424 | Freewheel clutch | Swen Doerrie | 2013-06-11 |
| 8157069 | Overrunning clutch | — | 2012-04-17 |
| 7987957 | Bushing-type roller overrunning clutch with a cage for needles or rollers | Swen Dörrie, Peter Ruffershöfer | 2011-08-02 |
| 7975819 | Bushing-type roller overrunning clutch with a solid outer ring | Swen Dörrie, Werner Wirth, Volker Ploetz | 2011-07-12 |
| 7854305 | Sprag | Tomas Smetana, Frank Straub, Volker Ploetz | 2010-12-21 |
| 7690488 | Roller freewheel | Volker Ploetz, Swen Dörrie, Helmut Kalb, Alois Leisgang | 2010-04-06 |
| 7644813 | Freewheel coupling | Frank Straub | 2010-01-12 |
| 7503442 | Freewheel coupling | Frank Straub | 2009-03-17 |
| 7434671 | Overrunning clutch | Frank Straub, Martin Halama | 2008-10-14 |
| 6453898 | Device to cover the sight on hunting and sports bows | Erich Hahn | 2002-09-24 |