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发明名称
TELEPHONE SYSTEM
摘要
申请公布号
CA422884(A)
申请公布日期
1944.09.26
申请号
CAD422884
申请日期
申请人
AUTOMATIC ELECTRIC LABORATORIES;ASSOCIATED TELEPHONE AND TELEGRAPH COMPANY
发明人
JOHN WICKS
分类号
主分类号
代理机构
代理人
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