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发明名称
Circuit arrangement for relay switches
摘要
申请公布号
US1811318(A)
申请公布日期
1931.06.23
申请号
US19290373907
申请日期
1929.06.26
申请人
TELEFONAKTIEBOLAGET L. M. ERICSSON
发明人
JOHNSON KARL GEORG
分类号
H04M3/523
主分类号
H04M3/523
代理机构
代理人
主权项
地址
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