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经营范围
发明名称
Photoelectric relay
摘要
申请公布号
US2234011(A)
申请公布日期
1941.03.04
申请号
US19390276085
申请日期
1939.05.27
申请人
RADIO CORPORATION OF AMERICA
发明人
JR. FRANCIS H. SHEPARD,
分类号
H01J40/14
主分类号
H01J40/14
代理机构
代理人
主权项
地址
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