ES66898A1 - Una lámpara eléctrica incandescente con cuerpo metálico en forma de hélice o espiral de menos de un milímetro de diámetro y llena de gas.
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Una lámpara eléctrica incandescente con cuerpo metálico en forma de hélice o espiral de menos de un milímetro de diámetro y llena de gas.
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ES66898A1918-04-301918-04-30Una lámpara eléctrica incandescente con cuerpo metálico en forma de hélice o espiral de menos de un milímetro de diámetro y llena de gas.
ExpiredES66898A1
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