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公开(公告)号：US1976460A
公开(公告)日：1934-10-09
申请号：US39696129
申请日：1929-10-03
Applicant: RCA CORP
Inventor： KLAAS POSTHUMUS , GOGH WILLEM DANIEL VAN
IPC: H03F1/13
CPC classification number: H03F1/13
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