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发明名称
Multioffice automatic telephone system
摘要
申请公布号
US1930522(A)
申请公布日期
1933.10.17
申请号
US19320599918
申请日期
1932.03.19
申请人
SIEMENS & HALSKE AKTIENGESELLSCHAFT
发明人
KEYSER ALFRED;SIMON FRANZ
分类号
H04M7/06;H04Q3/00
主分类号
H04M7/06
代理机构
代理人
主权项
地址
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