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发明名称
Anordning til Kontrolering af Koblingsforløbet ved Telefonanlæg ved Hjælp af Vekselstrømsimpulser.
摘要
申请公布号
DK45930(C)
申请公布日期
1932.07.18
申请号
DKD45930
申请日期
1930.07.26
申请人
TELEFONAKTIEBOLAGET L. M. ERICSSON
发明人
分类号
主分类号
代理机构
代理人
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