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ES26326A1900-07-231900-07-23Mejoras en el procedimiento químico para la fabricación de filamentos para lámparas eléctricas por incandescencia.
ExpiredES26326A1
(es)
Un procedimiento mecánico para fabricar soportes para lámparas incandescentes eléctricas llamadas "Bayonetas" o "Swan", y casquillas para dichas lámparas.