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公开(公告)号：US2621226A
公开(公告)日：1952-12-09
申请号：US2243548
申请日：1948-04-21
Applicant: RCA CORP
Inventor： CONRON WILLIAM H , SCHNEIDER FREDERICK H
IPC: H03F3/54
CPC classification number: H03F3/54
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