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First idea
1880: Denis Redmond builds the télescopie électrique (Electric Telescope) and transmits an image electrically -
Cathode Ray Tubes
1907: Campbell Swinton and Boris Rosing suggest using cathode ray tubes to transmit images via Electronic television -
Patents
Vladimir Kosma Zworykin patents his iconscope television transmission tube leading the way for further advancement in the television -
Wire Circuts
1924 - 1925: American Charles Jenkins and John Baird from Scotland, each demonstrate the mechanical transmissions of images over wire circuits -
color tube
Vladimir Kosma Zworykin patents the first television color tube
October 30: The first moving image was transmitted