Léon Theremin
Theremin moved to the United States, arriving December 30, 1927 with his first wife, Katia Constantinova. He performed the theremin with the New York Philharmonic in 1928. He patented his invention in the United States in 1928 and subsequently granted commercial production rights to RCA. Theremin set up a laboratory in New York in the 1930s, where he developed the theremin and experimented with other electronic musical instruments and other inventions.