Someone mentioned Lorenz. The name Lorenz actually refers to the electronics company which made many things including an encryption cipher machine in parallel with the much more famous Enigma machine. Lorenz were the manufacturers of Sonne (Consol) and an adaptaion of Sonne formed the basis of Knickbeim, the German WW2 bombing aid. Lorenz also made the Lorenz beam landing aid, which was the first of it's type appearing in the mid 30s.