| 1902 | Margarete and Heinrich Diehl open an art foundry |
| 1945 | Foundation of AKO in Eisenharz / Allgäu |
| 1950 | Production moved to Kisslegg |
| 1953 | First production of time switches in Nürnberg |
| 1955 | Production of infra-red rays |
| 1956 | First programmed timer for AEG Lavamat |
| 1962 | The factory in Wangen has been built |
| 1967 | First drive-electronic for machine tools |
| 1987 | Production start of "White Goods" components in Kisslegg |
| 1989 | Production start and grand opening of the new Controls Division facility in Nürnberg, Donaustraße |
| 1993 | 70 million programme timers delivered |
| 1994 | Diehl takes over AKO-Werke GmbH & Co. KG, Wangen |
| 1998 | Foundation of Diehl Controls Italia S.r.l. |
| 1999 | Foundation of Diehl Controls Polska sp.z.o.o. in Namyslow |
| 2000 | Foundation of Diehl Controls Nanjing Co. Ltd Production start of electromechanical and electronic controls in Namyslow (Poland) Production start of Front Panels in Kinmel Park 1 million radio metering systems have been delivered to Techem |
| 2001 | Organisational consolidation of AKO und Diehl Controls Nürnberg, forming Diehl AKO Stiftung & Co. KG |
| 2002 | Foundation of Diehl Controls North America Inc. in Chicago 100 years Diehl |
| 2003 | Foundation of Diehl Controls Mexico, S.A. de C.V. in Queretaro |
| 2005 | Beginning of hider production in Quingdao, China The first PLATINUM inverter is launched |
| 2006 | Foundation of development centre Wroclaw First presentation of PLATINUM inverters at Intersolar Freiburg |
| 2007 | The Photovoltaics department launches the innnovative PowerBlock system |
| 2008 | The new transformerless inverter TL is launched |
| 2009 | The new transformerless inverter TL is awarded with the top mark „excellent+“ in the February test of the solar magazine Photon |
| 2010 | The new highly effective three-phase inverter TL3 is launched |
| 2011 | Further development of TL inverter to TLD inverter in order to fulfil Medium Voltage Directive |
| 2012 | Launch of the newest isolated string inverter H The newest development, the inverter R3, is launched The new PLATINUM® Battery is presented at Intersolar Europe in Munich |
© 2013 Diehl Stiftung & Co. KG
