John Logie Baird was a Scottish engineer who gave the first public demonstration of a working television system in January 1926, using a mechanical scanning disc rather than an electronic sensor. His company sold television receivers commercially in the early 1930s, but the mechanical approach was superseded by Farnsworth's and Zworykin's electronic systems by the late 1930s.
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Demonstrated the first working mechanical television system.
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Television, Inventions Why this is disputed. Baird's mechanically scanned system was the first working television demonstrated publicly, in January 1926, a genuinely earlier and independent line of development that lost out commercially to electronic television by the late 1930s.
Source Encyclopaedia BritannicaEncyclopaedia Britannica editors
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1. Encyclopaedia Britannica
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