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发明名称
Indicator
摘要
申请公布号
US2216952(A)
申请公布日期
1940.10.08
申请号
US19380199229
申请日期
1938.03.31
申请人
RADIO CORPORATION OF AMERICA
发明人
LITTLE DAVID S.
分类号
H03J1/02
主分类号
H03J1/02
代理机构
代理人
主权项
地址
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