Léon Theremin 3, United States & Return to the Soviet Union Jimie 18.04.25 08:31 From Wikipedia United States After being sent on a lengthy tour of Europe starting 1927 – including London, Paris and towns in Germany – during which he demonstrated his invention to full audiences, Theremin found his way to the United States, arriving on 30 December 1927 with his first wife Katia. He performed the ..