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ES3478A1883-07-031883-07-03Un nuevo procedimiento para producir una luz blanca e intensa por la incandescencia de la magnesia en aparatos especiales.
ExpiredES3478A2
(es)
Un procedimiento de calefacción previa del aire, que alimenta la combustión de una pieza metálica, para hacer más intensos los efectos luminosos de aquellas.
Un nuevo aparato llamado proyector amplificador, el cual se destina a aumentar el poder iluminante de una luz cualquiera mediante la combinación de cristales bi-convexos.