2004 
Merger of the companies Albert Leitern GmbH, Frankfurt/Main, and KSS Gerüst- und Schweisstechnik, Gamstädt

1997 
Takeover of the trading company Gerüst- und Schweißtechnik GmbH in Gamstädt 

1993 
Start of the production of aluminum mobile and façade scaffolds as an aluminum welding company 

1990 
Establishment of the company Albert Gerüst- und Gerätetechnik GmbH Görschen as a trading company in the newly-formed German states

1983 
Relocation from the Hedderichstr. 45 to the Ferdinand-Porsche-Str. 29, Frankfurt/Main 

1982 
Establishment of the company Albert Leitern GmbH - Frankfurt/Main 

1972 
Takeover of the Willi Kemmerzell company in Frankfurt/Main which has worked as a color trading company since 1939 and as a scaffold trading company since 1945 

1947 
Establishment of the Wilhelm Albert company in Edelbach, Germany, as a ladder producing factory and saw mill