Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Societe des Etablissements Gaumont
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Societe des Etablissements Gaumont
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Application filed by Societe des Etablissements GaumontfiledCriticalSociete des Etablissements Gaumont
Application grantedgrantedCritical
Publication of FR609828ApublicationCriticalpatent/FR609828A/fr
H01J1/00—Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps
H01J1/02—Main electrodes
H01J1/13—Solid thermionic cathodes
H01J1/135—Circuit arrangements therefor, e.g. for temperature control
FR609828D1925-05-041925-05-04Coupe-circuit automatique pour lampes à trois électrodes
ExpiredFR609828A
(fr)