The origins of the company can be traced back to 1910, when Professor Hugo Junkers was granted a patent for an all-wing aircraft, with engines, fuel system, crew, freight holds and passenger accommodation contained within the wing. this was followed in 1915 by the Junkers J1, a fully metallic, low-wing cantilever monoplane. After the First World War, Professor Junkers began quantity production, by the dedicated Junkers Flugzeugbau, of a number of all-metal commercial aircraft, culminating in the 1930s in types that could also be used for bombing missions.