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公开(公告)号:US3212029A
公开(公告)日:1965-10-12
申请号:US10607861
申请日:1961-04-27
Applicant: BELL TELEPHONE LABOR INC
Inventor: BIDDULPH RULON S , ALEXANDER FEINER
IPC: H04B3/40
CPC classification number: H04B3/40
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公开(公告)号:US2685615A
公开(公告)日:1954-08-03
申请号:US28545452
申请日:1952-05-01
Applicant: BELL TELEPHONE LABOR INC
Inventor: BIDDULPH RULON S , DAVIS KINGSBURY H
IPC: G10L15/00
CPC classification number: G10L15/00
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