Telefunken was founded in 1903 as "Gesellschaft für drahtlose Telegraphie Telefunken mbH" as a daughter of AEG and Siemens.

The trio AEG, Siemens and Telefunken started late with the introduction of super heterodyne radios.
In order to break open the market for two coil radio's the trio introduced a four coil-3-valve-super with inductive-capacitive coupling. Unfortunately this system generated a lot of noise during tuning. The "Nauen 330" got the nickname of "Pfeifende Johanna" (Whistling Johanna).

In 1967 Telefunken and AEG become Aktiengesellschaft AEG-Telefunken, later AEG sells Telefunken to Thomson France.

Telefunken logo 1911	Later Telefunken logo