Nov. 6th 1935 – Before the Institute of Radio Engineers in New York, American electrical engineer and inventor Edwin Howard Armstrong presented his study on using frequency modulation for radio broadcasting.
Edwin Howard Armstrong (December 18, 1890 – January 31, 1954). Armstrong was the inventor of frequency modulation (FM) radio.
Edwin Howard Armstrong
http://en.wikipedia.org/wiki/Edwin_Howard_Armstrong
The Birthplace of FM Broadcasting, Alpine, N.J.
Armstrong Tower
http://www.fybush.com/sites/2005/site-050610.html