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F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
F21Y2103/00—Elongate light sources, e.g. fluorescent tubes
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FR586201D1923-09-071924-09-06Dispositif d'illumination pour objets ou surfaces relativement longs et étroits
ExpiredFR586201A
(fr)