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经营范围
发明名称
Protective device
摘要
申请公布号
US2092373(A)
申请公布日期
1937.09.07
申请号
US19340713280
申请日期
1934.02.28
申请人
RADIO CORPORATION
发明人
HOLMES RALPH S.
分类号
H01J29/98
主分类号
H01J29/98
代理机构
代理人
主权项
地址
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