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发明名称
TELEPHONE SYSTEMS
摘要
申请公布号
CA539700(A)
申请公布日期
1957.04.16
申请号
CAD539700
申请日期
申请人
SIEMENS BROTHERS AND CO. LIMITED
发明人
KENNETH R. YATES
分类号
主分类号
代理机构
代理人
主权项
地址
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