The name of the company was changed to Telefunken GmbH on January 4, 1955. Due to the expanded business activities of Telefunken, AEG increased the capital of the company to DM 100 million in 1958. 

The Sender Freies Berlin (SFB) station ordered the first German stereo studio in 1961.  The harbor radar system, supplied by Telefunken, was officially placed for service in Hamburg Harbor in August 1962, while the first German transistor receiver (six transistors) was produced in a test series in 1956. Prof. Dr. Walter Bruch filed the fundamental PAL "time decoder" patent on December 31, 1962. It was the first German stereo studio of its kind, and Telefunken sought to it that there was nothing else quite like it.