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.)
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Individual
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Individual
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Priority to ES4084ApriorityCriticalpatent/ES4084A1/es
Publication of ES4084A1publicationCriticalpatent/ES4084A1/es
Un procedimiento o sistema de instalación de estaciones telegráficas, telefónicas y de señales establecidas sobre una misma línea que permite la comunicación directa de dos cualesquiera de dichas estaciones sin intervención de una central.