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发明名称
Production of highly electro-positive metals within sealed vessels, such, for example, as thermionic valves
摘要
申请公布号
US2054649(A)
申请公布日期
1936.09.15
申请号
US19350014636
申请日期
1935.04.04
申请人
THE M-O VALVE COMPANY LIMITED
发明人
BENJAMIN MARK
分类号
H01J9/395
主分类号
H01J9/395
代理机构
代理人
主权项
地址
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