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发明名称
Electron device
摘要
申请公布号
US2067330(A)
申请公布日期
1937.01.12
申请号
US19320627927
申请日期
1932.08.08
申请人
TELEFUNKEN GESELLSCHAFT FUR DRAHTLOSE TELEGRAPHIE M. B. H.
发明人
MICHELSSEN FRITZ
分类号
H01J3/02
主分类号
H01J3/02
代理机构
代理人
主权项
地址
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