ES134734A1 - Una mejora en la fabricación de filamentos luminosos de forma espiral, constituido por pequeños cristales, para lámparas de incandescencia.
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Una mejora en la fabricación de filamentos luminosos de forma espiral, constituido por pequeños cristales, para lámparas de incandescencia.
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Fabrica Espanola De Lamparas Electricas Excel S A
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Fabrica Espanola De Lamparas Electricas Excel S A
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ES134734A1934-05-301934-05-30Una mejora en la fabricación de filamentos luminosos de forma espiral, constituido por pequeños cristales, para lámparas de incandescencia.
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