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发明名称
Einrichtung zum Verhindern der Wahl bestimmter Kennzahlen in telefonischen Leitungsnetzen
摘要
申请公布号
DE1512096(A1)
申请公布日期
1969.07.17
申请号
DE19671512096
申请日期
1967.03.09
申请人
TN-TELE-NORMA COMPANY ELETTRO TELEFONICA S.R.L.
发明人
分类号
H04Q3/00
主分类号
H04Q3/00
代理机构
代理人
主权项
地址
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