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公开(公告)号：US2913616A
公开(公告)日：1959-11-17
申请号：US66466757
申请日：1957-06-10
Applicant: RCA CORP
Inventor： FREDERICK AMMENWERTH MARTIN , JOSEPH CAPRAROLA LEROY
CPC classification number: H01J19/00 , H01J19/46 , H01J2893/0006 , H01J2893/0026
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