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发明名称
MULTIPLEX TELEPHONE SYSTEM
摘要
申请公布号
CA451483(A)
申请公布日期
1948.09.28
申请号
CAD451483
申请日期
申请人
FEDERAL TELEPHONE AND RADIO CORPORATION
发明人
EDMOND M. DELORAINE
分类号
主分类号
代理机构
代理人
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