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发明名称
Electron emitter
摘要
申请公布号
US2146365(A)
申请公布日期
1939.02.07
申请号
US19340757318
申请日期
1934.12.13
申请人
BATCHELOR JOHN C
发明人
BATCHELOR JOHN C.
分类号
H01J29/48
主分类号
H01J29/48
代理机构
代理人
主权项
地址
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