IT1139776B - Sistema per la connessione di telefoni analogici a contrali di commutazione numeriche
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Sistema per la connessione di telefoni analogici a contrali di commutazione numeriche
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IT1139776B
IT1139776BIT25131/81AIT2513181AIT1139776BIT 1139776 BIT1139776 BIT 1139776BIT 25131/81 AIT25131/81 AIT 25131/81AIT 2513181 AIT2513181 AIT 2513181AIT 1139776 BIT1139776 BIT 1139776B
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Priority to IT25131/81ApriorityCriticalpatent/IT1139776B/it
Publication of IT8125131A0publicationCriticalpatent/IT8125131A0/it
Application grantedgrantedCritical
Publication of IT1139776BpublicationCriticalpatent/IT1139776B/it