A cathode ray tube is a vacuum tube that produces images when its phosphorescent surface is struck by electron beams.
German, Heinrich Geissler
invents the Geissler tube, created using his mercury pump this was the first good evacuated (of air) vacuum tube later modified by Sir William Crookes.
German mathematician and physicist, Julius Plucker
experiments with invisible cathode rays. Cathode rays were first identified by Julius Plucker.
Englishmen, Sir William Crookes
was the first person to confirm the existence of cathode rays by displaying them, with his invention of the Crookes tube, a crude prototype for all future cathode ray tubes.
German, Karl Ferdinand Braun
invents the CRT oscilloscope - the Braun Tube was the forerunner of today's television and radar tubes.
Vladimir Kosma Zworykin
invented a cathode ray tube called the kinescope - for use with a primitive television system.
Allen B. Du Mont
made the first commercially practical and durable CRT for television.