July 5, 2017

Inspired by the telegraph and photography, many 19th century inventors sought ways to capture, transmit, and view images by electricity. One of the most influential inventors was Paul Nipkow (1860-1940), who in 1884 proposed a striking new way to translate a visual ima...

June 28, 2017

Elisha Gray was an American electrical engineer who co-founded the Western Electric Manufacturing Company. Gray is best known for his development of a telephone prototype in 1876 in Highland Park, Illinois. Some recent authors have argued that Gray should be considered...

June 21, 2017

In 1956 Charles P. Ginsburg and Ray Dolby of Ampex Corporation, a U.S. electronics firm, developed the first practical videotape recorder. Their machine revolutionized television broadcasting; recorded shows virtually replaced live telecasts with a few exceptions, such...

June 14, 2017

The phonograph is a device, invented in 1877, for the mechanical recording and reproduction of sound. In its later forms, it is also called a gramophone, or, since the 1940s, a record player. The sound vibration waveforms are recorded as corresponding physical deviatio...

June 7, 2017

Guglielmo Marconi,  is popularly known as “the inventor of radio,” a mischaracterization that critics and supporters of his many rivals are quick to seize upon. Marconi was actually the first person to use radio waves to communicate. His first patent was for “Improveme...

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