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发明名称
LOW LOSS SIGNAL DETECTOR CIRCUIT FOR TELEPHONE SYSTEM
摘要
申请公布号
CA830033(A)
申请公布日期
1969.12.16
申请号
CAD830033
申请日期
申请人
NORTH ELECTRIC COMPANY
发明人
CARL G. SVALA
分类号
主分类号
代理机构
代理人
主权项
地址
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