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发明名称
Cathode for electrical discharge tubes
摘要
申请公布号
US2808531(A)
申请公布日期
1957.10.01
申请号
US19530341514
申请日期
1953.03.10
申请人
SIEMENS & HALSKE AKTIENGESELLSCHAFT
发明人
KATZ HELMUT;COSTA SIEGFRIED
分类号
H01J1/28
主分类号
H01J1/28
代理机构
代理人
主权项
地址
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