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公开(公告)号：US3099719A
公开(公告)日：1963-07-30
申请号：US15802761
申请日：1961-12-08
Applicant: BELL TELEPHONE LABOR INC
Inventor： GERBORE ALEXANDER E , PLYER ROGER A , STEGER JR WILLIAM C
IPC: H04Q3/00
CPC classification number: H04Q3/0004
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