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Application filed by Ets Claude Paz & SilvafiledCriticalEts Claude Paz & Silva
Publication of CH223649ApublicationCriticalpatent/CH223649A/fr
H01J61/70—Lamps with low-pressure unconstricted discharge having a cold pressure < 400 Torr
CH223649D1938-12-121939-11-27Tube à décharge électrique à atmosphère gazeuse comportant des électrodes thermo-émissives chauffées par la décharge.
CH223649A
(fr)