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发明名称
Party line telephone switching
摘要
申请公布号
US2938080(A)
申请公布日期
1960.05.24
申请号
US19560592789
申请日期
1956.06.21
申请人
SIEMENS & HALSKE AKTIENGESELLSCHAFT
发明人
SCHEUNERT ALFRED
分类号
H04Q5/00
主分类号
H04Q5/00
代理机构
代理人
主权项
地址
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