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公开(公告)号：US2570606A
公开(公告)日：1951-10-09
申请号：US9278849
申请日：1949-05-12
Applicant: RCA CORP
Inventor： SIMPSON KENNETH H
IPC: H01J1/18
CPC classification number: H01J1/18
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公开(公告)号：US2493555A
公开(公告)日：1950-01-03
申请号：US2972748
申请日：1948-05-28
Applicant: RCA CORP
Inventor： SIMPSON KENNETH H
IPC: H01J21/20
CPC classification number: H01J21/20 , H01J2893/003
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