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Publication of FR695129ApublicationCriticalpatent/FR695129A/fr
H01K9/00—Lamps having two or more incandescent bodies separately heated
H01K9/02—Lamps having two or more incandescent bodies separately heated to provide substitution in the event of failure of one of the bodies
H01K9/04—Lamps having two or more incandescent bodies separately heated to provide substitution in the event of failure of one of the bodies with built-in manually operated switch
FR695129D1930-05-061930-05-06Dispositif pour fixation de lampes électriques
ExpiredFR695129A
(fr)