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Priority to ES0003980UpriorityCriticalpatent/ES3980Y/en
Publication of ES3980UpublicationCriticalpatent/ES3980U/en
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Publication of ES3980YpublicationCriticalpatent/ES3980Y/en
A device for repairing light in electric filament lamps, essentially consisting of a refractive lens produced in the ampoule of said lamps with the mass of glass or glass with which said ampoule is formed. (Machine-translation by Google Translate, not legally binding)
ES0003980U1935-07-151935-07-15
Light cooling device in electric incandescent lamps.
ExpiredES3980Y
(en)
New type of electric incandescent lamp in the vacuum, removable, allowing the replacement of any of its parts, including only the filament (Machine-translation by Google Translate, not legally binding)