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发明名称
Electrical circuit controlling device
摘要
申请公布号
US2421998(A)
申请公布日期
1947.06.10
申请号
US19410393801
申请日期
1941.05.16
申请人
SIGNAL ENGINCERING & MANUFACTURING COMPANY
发明人
CYPSER HUGO F.
分类号
H04M19/04
主分类号
H04M19/04
代理机构
代理人
主权项
地址
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