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经营范围
发明名称
Selective relay
摘要
申请公布号
US2227828(A)
申请公布日期
1941.01.07
申请号
US19380230995
申请日期
1938.09.21
申请人
RADIO CORPORATION
发明人
GODDARD DE WITT RUGG
分类号
H01H51/04
主分类号
H01H51/04
代理机构
代理人
主权项
地址
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