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经营范围
发明名称
Multiple plate photo electric tube
摘要
申请公布号
US1870596(A)
申请公布日期
1932.08.09
申请号
US19300440333
申请日期
1930.03.31
申请人
WALTER HOWEY
发明人
WOODWARD BENJAMIN W.
分类号
H01J40/04
主分类号
H01J40/04
代理机构
代理人
主权项
地址
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