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发明名称
Interconnecting of subscribers' lines in final selectors
摘要
申请公布号
US2741664(A)
申请公布日期
1956.04.10
申请号
US19520316573
申请日期
1952.10.24
申请人
DE STAAT DER NEDERLANDEN
发明人
OBERMAN ROELOF MAARTEN MARIE
分类号
H04Q3/42
主分类号
H04Q3/42
代理机构
代理人
主权项
地址
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