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公开(公告)号：US2439886A
公开(公告)日：1948-04-20
申请号：US61114645
申请日：1945-08-17
Applicant: WESTINGHOUSE ELECTRIC CORP
Inventor： ROBERT DENMARK , MCWHIRTER CARSON H
IPC: H01J5/42
CPC classification number: H01J5/42 , H01J2893/0034 , Y10T403/217
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公开(公告)号：US2438113A
公开(公告)日：1948-03-23
申请号：US50914543
申请日：1943-11-05
Applicant: WESTINGHOUSE ELECTRIC CORP
Inventor： ROBERT DENMARK
IPC: H01J19/00
CPC classification number: H01J19/00 , H01J2893/0025
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