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经营范围
发明名称
Oscillograph and cathode-ray tube therefor
摘要
申请公布号
US2509255(A)
申请公布日期
1950.05.30
申请号
US19470769553
申请日期
1947.08.19
申请人
INTERNATIONAL STANDARD ELECTRIC CORPORATION
发明人
SMYTH CHARLES NORMAN
分类号
G01R13/22
主分类号
G01R13/22
代理机构
代理人
主权项
地址
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