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F21H—INCANDESCENT MANTLES; OTHER INCANDESCENT BODIES HEATED BY COMBUSTION
F21H3/00—Manufacturing incandescent mantles; Treatment prior to use, e.g. burning-off; Machines for manufacturing
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FR335541D1902-09-301903-09-24Perfectionnements à la fabrication des manchons à incandescence ainsi qu'aux becs ou bruleurs employés à cet effet
ExpiredFR335541A
(fr)