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公开(公告)号：US2226928A
公开(公告)日：1940-12-31
申请号：US29442039
申请日：1939-09-12
Applicant: RCA CORP
Inventor： HARVEY ROBERT L , CHANDIER WENTWORTH
IPC: H01P3/02
CPC classification number: H01P3/02
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