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H01J31/08—Cathode ray tubes; Electron beam tubes having a screen on or from which an image or pattern is formed, picked up, converted, or stored
H01J31/49—Pick-up adapted for an input of electromagnetic radiation other than visible light and having an electric output, e.g. for an input of X-rays, for an input of infrared radiation
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FR861384D1939-07-271939-07-27Perfectionnements aux dispositifs photo-électriques
ExpiredFR861384A
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