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发明名称
Anordning ved Telefonanlæg med et mellem Centralbatteriet og Taleledningens Mikrofonfødespoder indskudt, ved Opkald paavirket Relais.
摘要
申请公布号
DK44631(C)
申请公布日期
1931.09.21
申请号
DKD44631
申请日期
1930.09.09
申请人
TELEFONAKTIEBOLAGET L. M. ERICSSON
发明人
分类号
主分类号
代理机构
代理人
主权项
地址
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