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经营范围
发明名称
Oscillograph apparatus
摘要
申请公布号
US2162827(A)
申请公布日期
1939.06.20
申请号
US19340760062
申请日期
1934.12.28
申请人
RADIO CORPORATION OF AMERICA
发明人
SCHRADER HAROLD J.
分类号
G01R27/32
主分类号
G01R27/32
代理机构
代理人
主权项
地址
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