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发明名称
Telephone system
摘要
申请公布号
US2188467(A)
申请公布日期
1940.01.30
申请号
US19370127617
申请日期
1937.02.25
申请人
SIEMENS & HALSKE AKTIENGESELLSCHAFT
发明人
WOCHINGER EDUARD
分类号
H04Q1/48
主分类号
H04Q1/48
代理机构
代理人
主权项
地址
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