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经营范围
发明名称
Photocell circuit
摘要
申请公布号
US2294375(A)
申请公布日期
1942.09.01
申请号
US19410387666
申请日期
1941.04.09
申请人
RADIO CORPORATION
发明人
BELAR HERBERT
分类号
H01J17/30
主分类号
H01J17/30
代理机构
代理人
主权项
地址
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