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发明名称
TELEPHONE SIGNALING SYSTEM
摘要
申请公布号
CA505876(A)
申请公布日期
1954.09.14
申请号
CAD505876
申请日期
申请人
WESTERN ELECTRIC COMPANY, INCORPORATED
发明人
REYMOND J. KIRCHER
分类号
主分类号
代理机构
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