In 1961, HFB and VFW (itself a merger of Focke-Wulf and Weserflug) jointly formed the Entwicklungsring Nord (ERNO) to develop air and space products [REF].
In May 1969, HFB merged with Messerschmitt-Bölkow to form Messerschmitt-Bölkow-Blohm (MBB), which in turn was taken over by Deutsche Aerospace (DASA) in September 1989 [REF].