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发明名称
Switching device for the setting of crossbar switches by means of markers
摘要
申请公布号
US2583848(A)
申请公布日期
1952.01.29
申请号
US19470750032
申请日期
1947.05.23
申请人
TELEFONAKTIEBOLAGET L M ERICSSON
发明人
JOHNSON KARL GEORG
分类号
H04Q3/00
主分类号
H04Q3/00
代理机构
代理人
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