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发明名称
Indirectly heated cathode
摘要
申请公布号
US2145833(A)
申请公布日期
1939.01.31
申请号
US19370133541
申请日期
1937.03.29
申请人
HYGRADE SYLVANIA CORPORATION
发明人
IMBODEN GEORGE J.
分类号
H01J1/26
主分类号
H01J1/26
代理机构
代理人
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地址
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