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发明名称
TELEPHONE SYSTEM
摘要
申请公布号
CA445441(A)
申请公布日期
1947.12.09
申请号
CAD445441
申请日期
申请人
AUTOMATIC ELECTRIC LABORATORIES
发明人
LAWRENCE DENTON;HARRY G. EVERS
分类号
主分类号
代理机构
代理人
主权项
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