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经营范围
发明名称
Photoelectric device
摘要
申请公布号
US2139223(A)
申请公布日期
1938.12.06
申请号
US19310536648
申请日期
1931.05.11
申请人
RADIO CORPORATION
发明人
BOER JAN HENDRIK DE;GEEL WILLEM CHRISTIAAN VAN
分类号
H01J40/16
主分类号
H01J40/16
代理机构
代理人
主权项
地址
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