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公开(公告)号：US3020446A
公开(公告)日：1962-02-06
申请号：US73686758
申请日：1958-05-21
Applicant: GEN ELECTRIC
Inventor： MICHAEL BESSARAB
IPC: H01J25/56
CPC classification number: H01J25/56
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公开(公告)号：US3300681A
公开(公告)日：1967-01-24
申请号：US50690165
申请日：1965-10-22
Applicant: GEN ELECTRIC
Inventor： MICHAEL BESSARAB
IPC: H01J23/10
CPC classification number: H01J23/10
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