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LAMPE DELTA
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LAMPE DELTA
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Application filed by LAMPE DELTAfiledCriticalLAMPE DELTA
Application grantedgrantedCritical
Publication of FR739778ApublicationCriticalpatent/FR739778A/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
FR739778D1932-07-081932-07-08Culot à baïonnette pour lampe à deux filaments
ExpiredFR739778A
(fr)