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发明名称
Electron discharge device
摘要
申请公布号
US1974916(A)
申请公布日期
1934.09.25
申请号
US19340722323
申请日期
1934.04.25
申请人
HYGRADE SYLVANIA CORPORATION
发明人
GOODWIN VERNON D.
分类号
H01J19/42
主分类号
H01J19/42
代理机构
代理人
主权项
地址
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