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经营范围
发明名称
Protective circuit
摘要
申请公布号
US2577848(A)
申请公布日期
1951.12.11
申请号
US19500144544
申请日期
1950.02.16
申请人
RADIO CORPORATION OF AMERICA
发明人
GREENLEAF FRANCIS D.;SEEBERGER LOUIS M.;BUDER SPURGEON H.
分类号
H04N3/20
主分类号
H04N3/20
代理机构
代理人
主权项
地址
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