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公开(公告)号:DE707215C
公开(公告)日:1941-06-16
申请号:DER0102609
申请日:1938-06-17
Applicant: RCA CORP
Inventor: HEROLD EDWARD W
IPC: H03F1/50
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公开(公告)号:DE707215C
公开(公告)日:1941-06-16
申请号:DER0102609
申请日:1938-06-17
Applicant: RCA CORP
Inventor: HEROLD EDWARD W
IPC: H03F1/50