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| 1971 | Establishment of the company FEDERHENN by Hartmut Federhenn |
| 1972 | Implementation of the product group WORKER for the rationalization of the window production |
| 1981 | Invention of the Sashes-Stopping Station for the screwing together of DK-fittings |
| 1988 | Set up of the first completely automated transport- and buffer system in the window production worldwide. |
| 1990 | Handover of the company Federhenn to the Claassen Maschinen GmbH |
| 1993 | Development and production of the profile center for the complete processing of the reinforced PVC-profile bar. |
| 1994 | The Claassen Maschinen GmbH additionally acquires the Fa. Torsten Schirmer GmbH |
| 1999 | The companies Schirmer and Federhenn are integrated in a holding. |
| 1999 | The develpoment and production of the bar processing center SBZ 100-G. |
| 2000 | The development and production of the cutting machine ZA 550 for PVC profiles |
| 2003 | Federhenn buys out of the holding – the AFS Federhenn Maschinen GmbH is established. |
| 2007 | The AFS Federhenn Maschinen GmbH becomes the main owner of the Hollinger Maschinen GmbH |
| 2008 | Development and production of the processing- and sawing machine BSA 160/ BSA 200/ BSA 240 for PVC profiles. |
| 2009 | Integration of the processing- and sawing machine BSA with the bar processing center SBZ with a stroke-independent cross conveyor magazine |
| 2010 | Development and production of fully automated 4-side-hardware-screwing machine FB SA 400/P4 for tilt and turn sashes, as well as the cutting machine ZAS 550 for special profiles |
| 2011 | Development and production of automatic glass conveying, buffering and sorting |
| 2012 | Introduction of the fully automated glass insertion using robotic technology |
| 2016 | Takeover of the company AFS Federhenn Maschinen GmbH |
