Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nokia Spain SA
Original Assignee
Alcatel Espana SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US628612Aexternal-prioritypatent/US2492344A/en
Application filed by Alcatel Espana SAfiledCriticalAlcatel Espana SA
Publication of ES182500A1publicationCriticalpatent/ES182500A1/es
Mejoras en sistemas de centrales telefónicas, caracterizadas por un sistema de separación de circuitos, que incluye los medios para producir impulsos distintos, teniendo porciones que varían en amplitud, de acuerdo con las señales, medios para usar una parte de dichos impulsos de bajo de la porción para establecer y mantener un circuito buscador de línea, y medios para usar dicha porción variante para llevar dichas señales a un circuito de salida.
ES0182500A1945-11-141948-02-20MEJORAS EN SISTEMAS DE CENTRALES TELEFoNICAS
ExpiredES182500A1
(es)