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
Application filed by Alcatel Espana SAfiledCriticalAlcatel Espana SA
Priority to ES0231231ApriorityCriticalpatent/ES231231A1/en
Publication of ES231231A1publicationCriticalpatent/ES231231A1/en
An amplifying system of the received telephone currents that can be added to any telephone set of the normal type already installed, without any modification or change being necessary in said apparatuses. (Machine-translation by Google Translate, not legally binding)
ES0231231A1956-10-091956-10-09Amplifier system for telephone appliances (Machine-translation by Google Translate, not legally binding)
ExpiredES231231A1
(en)