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公开(公告)号：US1990170A
公开(公告)日：1935-02-05
申请号：US70000733
申请日：1933-11-27
Applicant: GEN ELECTRIC
Inventor： JOSEPH DELLIAN
IPC: H01J61/96
CPC classification number: H01J61/96
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公开(公告)号：US2275739A
公开(公告)日：1942-03-10
申请号：US33645240
申请日：1940-05-21
Applicant: GEN ELECTRIC
Inventor： JOSEPH DELLIAN , JOSEF KERN
IPC: H01J61/52
CPC classification number: H01J61/52
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