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发明名称
Indirectly heated cathode
摘要
申请公布号
US2504335(A)
申请公布日期
1950.04.18
申请号
US19470766801
申请日期
1947.08.06
申请人
HARTFORD NATIONAL BANK AND TRUST COMPANY
发明人
JONKER JOHAN LODEWIJK HENDRIK
分类号
H01J1/20;H05B3/00
主分类号
H01J1/20
代理机构
代理人
主权项
地址
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