American audio engineer Jack Mullin acquired two Magnetophon recorders and fifty reels of magnetic tape from a German radio station at Bad Nauheim near Frankfurt in 1945.
•
This includes a performance of Beethoven's "Emperor" Concerto with pianist Walter Gieseking and the Berlin Reichssenders Orchestra conducted by Artur Rother.
Beginning in 1947, Eimac operated FM radio station KSBR from their plant in San Bruno, California, one of only two FM stations in the United States to test the new Rangertone tape recorders (adapted from the German Magnetophon recorders).
On 1 December 1932 Pfleumer granted AEG the right to use his invention when building the world's first practical tape recorder, called Magnetophon K1.