1940 – The Federal Communications Commission (FCC) got its very first demonstration of FM radio. The new medium, developed by Edwin H. Armstrong, was free of interference, static, and noise in thunderstorms. The first FM transmitter was put in operation the following year.
1954 – The Duoscopic TV receiver was unveiled. The TV set allowed a person or group to watch two different shows at the same time. It was a primitive, picture-in-picture, split-screen that was tested in New York City and Chicago.
1957 – The Hamilton Watch Company was the first to introduce an electric watch; now a standard in the watch world.