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发明名称
Electroresponsive device
摘要
申请公布号
US1743749(A)
申请公布日期
1930.01.14
申请号
US19290331752
申请日期
1929.01.11
申请人
GENERAL ELECTRIC COMPANY
发明人
ARKELL FREDERICK G.
分类号
H04R9/02
主分类号
H04R9/02
代理机构
代理人
主权项
地址
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