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H01K9/00—Lamps having two or more incandescent bodies separately heated
H01K9/08—Lamps having two or more incandescent bodies separately heated to provide selectively different light effects, e.g. for automobile headlamp
FR629575D1926-05-071926-05-07
Electric lamp with several independent light sources for automobile headlights and other applications
ExpiredFR629575A
(en)