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发明名称
DEVICE FOR LIMITING ACCESS OF TELEPHONE SUBSCRIBERS TO HIGHER LEVEL
摘要
申请公布号
BG24047(A1)
申请公布日期
1977.12.15
申请号
BG19760032177
申请日期
1976.01.26
申请人
TODOROV,VIKTOR V.;DIMITROV,IVAN G.;DIMITROV,PETR A.
发明人
TODOROV,VIKTOR V.;DIMITROV,IVAN G.;DIMITROV,PETR A.
分类号
H04M3/38;(IPC1-7):H04M3/38
主分类号
H04M3/38
代理机构
代理人
主权项
地址
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