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发明名称
Telephone system
摘要
申请公布号
US2070876(A)
申请公布日期
1937.02.16
申请号
US19350030379
申请日期
1935.07.08
申请人
SIEMENS & HALSKE AKTIENGESELLSCHAFT
发明人
WOCHINGER EDUARD
分类号
H04Q3/58
主分类号
H04Q3/58
代理机构
代理人
主权项
地址
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