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F21H—INCANDESCENT MANTLES; OTHER INCANDESCENT BODIES HEATED BY COMBUSTION
F21H1/00—Incandescent mantles; Selection of imbibition liquids therefor
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FR400444D1909-03-081909-03-08Procédé pour la fabrication de manchons en soie artificielle pour la lumière incandescente par le gaz
ExpiredFR400444A
(fr)