Most of the aircraft built by HFB/B&V would in fact be other companies' designs and major subassemblies, contracted under license, including tens of thousands of aircraft each for Dornier, Heinkel, Junkers and Messerschmitt.[1] Alongside its volume manufacturing the company also maintained its own design office and workshops which continued to develop and build new types throughout the company's life. The first planes it produced were designated with the official RLM company code "Ha".