Zworykin patented an electronic television system.
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Vladimir Zworykin had taken out the first patent for color television.
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A legal battle ensued in the late thirties, when RCA,
the company Zworykin worked for wanted to claim the right to the patent(and the royalties).
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Vladimir Zworykin improved television with the invention of a completely electric camera-
the Iconoscope, and a receiver- the Kinescope, which both used a cathode ray tube.
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The Russian Vladimir K. Zworykin applied for a patent for an electron scanning tube(a
part that could be considered to be the“heart” of a television) in 1923 already, but could not get his television to work until 1934.