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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
FR748818D1933-01-101933-01-10Perfectionnements apportés aux lampes d'éclairage et, notamment, aux lampes pour projecteurs de véhicules automobiles
ExpiredFR748818A
(fr)