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公开(公告)号：US2185378A
公开(公告)日：1940-01-02
申请号：US15043237
申请日：1937-06-26
Applicant: RCA CORP
Inventor： MALOFF ICURY G , EPSTCIN DAVID W , WENDT KARL R
IPC: H01J29/52
CPC classification number: H01J29/52
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