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公开(公告)号：US3143246A
公开(公告)日：1964-08-04
申请号：US21772662
申请日：1962-08-17
Applicant: GEN ELECTRIC
Inventor： HAGER JAMES A
IPC: H01J9/46
CPC classification number: H01J9/46 , H01J2893/0096
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公开(公告)号：US2683837A
公开(公告)日：1954-07-13
申请号：US20572751
申请日：1951-01-12
Applicant: GEN ELECTRIC
Inventor： HAGER JAMES A
IPC: H01J9/04
CPC classification number: H01J9/042
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