History Trade name GekaKonus 2001 Siempelkamp takes over to 100% of the company shares. 2000 Take over of economical capital value and contract of the employees from the insolvency of company "Bertrams-Konus" Change of name into "GekaKonus Energie- und Umwelttechnik GmbH & Co. KG" 1999 Investment of company Siempelkamp as shareholder. The initial company name is changed into Geka Energie- und Umwelttechnik GmbH & Co.KG * Registered Trademarks of company Siempelkamp, Krefeld 1971 to 1965