1924: John Logie Baird demonstrates a semi-mechanical television system with the transmission of moving silhouette images in England.The patent is not granted until 1938 after significant revisions and patent interference actions. Vladimir Zworykin applies for a patent for an all-electronic television system, the first ancestor of the electric scanning television camera. This time 48-line moving silhouette images are transmitted at 16 frames per second from Washington to Anacostia Navy station.
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