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发明名称
VERFAHREN UND VORRICHTUNG ZUR UEBERTRAGUNG UND ZUM EMPFANGEN VON NACHRICHTEN UEBER TELEFONLEITUNGEN
摘要
申请公布号
DE2732128(A1)
申请公布日期
1978.02.16
申请号
DE19772732128
申请日期
1977.07.15
申请人
DUINA DATA SYSTEMS S.P.A.
发明人
MARCELLO,ASTORRI;SERGIO,CANTARANO
分类号
H04L25/05;H04M11/06;(IPC1-7):H04M11/06;H04L25/50
主分类号
H04L25/05
代理机构
代理人
主权项
地址
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