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发明名称
Stem machine
摘要
申请公布号
US2195483(A)
申请公布日期
1940.04.02
申请号
US19370161392
申请日期
1937.08.28
申请人
RADIO CORPORATION OF AMERICA
发明人
FRANKE AUGUST J.
分类号
H01J9/32
主分类号
H01J9/32
代理机构
代理人
主权项
地址
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