AEG Magnetophon Tape Recorder (1935)
Fritz Pfleumer's magnetic tape was put to good use in 1935, when German electronics-engineering company AEG (Allgemeine Elektricitäts-Gesellschaft) unveiled the first reel-to-reel tape recorder for everyday use. The Magnetophon was designed with Pfleumer's magnetic tape in mind and premiered at the Berlin International Radio Exhibition. As with most original iterations of these devices, Magnetophon's first recordings were distorted and nearly inscrutable. But by 1939, tape manufacturers began using a different kind of oxide that provided extra clarity and helped cement Magnetophon as a pioneering piece of aural history.