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.)
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
Application filedfiledCritical
Priority to ES1979241428UpriorityCriticalpatent/ES241428Y/es
Publication of ES241428UpublicationCriticalpatent/ES241428U/es
Application grantedgrantedCritical
Publication of ES241428YpublicationCriticalpatent/ES241428Y/es
ES1979241428U1979-02-161979-02-16Disposicion de circuitos para reconocer y evaluar modifica- ciones de estado en centrales telefonicas.
ExpiredES241428Y
(es)