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公开(公告)号：US2069507A
公开(公告)日：1937-02-02
申请号：US67812833
申请日：1933-06-29
Applicant: RCA CORP
Inventor： MCYER RUST NOEL , FAIRBURN BRETT GEORGE
IPC: H01J19/02
CPC classification number: H01J19/02 , H01J2893/0001
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