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公开(公告)号：US2148039A
公开(公告)日：1939-02-21
申请号：US13912237
申请日：1937-04-27
Applicant: RCA CORP
Inventor： REID JOHN D , KIRKWOOD LOREN R
IPC: H03J3/10
CPC classification number: H03J3/10
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