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发明名称
TELEPHONE LINE CIRCUIT
摘要
申请公布号
CA519015(A)
申请公布日期
1955.11.29
申请号
CAD519015
申请日期
申请人
NORTHERN ELECTRIC COMPANY
发明人
EDWARD H. LANHAM
分类号
主分类号
代理机构
代理人
主权项
地址
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