Transistor radio
A transistor radio is a small portable radio receiver that uses transistor-based circuitry. Following their development in 1954, made possible by the invention of the transistor in 1947, they became the most popular electronic communication device in history, with billions manufactured during the 1960s and 1970s. Their pocket size sparked a change in popular music listening habits, allowing people to listen to music anywhere they went. Beginning in the 1980s, however, cheap AM transistor radios were superseded by devices with higher audio quality such as portable CD players, personal audio players, boomboxes, and (eventually) smartphones, some of which contain radios themselves.
Herbert Mataré
At the same time as the American researchers and independently, the German researchers Mataré and Heinrich Welker developed the first operational "French transistor" at Compagnie des Freins & Signaux Westinghouse in Aulnay-sous-Bois near Paris during the years 1945 to 1948. They filed their first transistor patent application on 13 August 1948. On 18 May 1949, this European invention coined as the "Le Transistron" was presented to the public.