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公开(公告)号：US3245040A
公开(公告)日：1966-04-05
申请号：US72971758
申请日：1958-04-21
Applicant: BELL TELEPHONE LABOR INC
Inventor： BURDETT DAVID F , DAVEY JAMES R , HARTY AUSTIN T , OSTENDORF JR BERNARD
IPC: H04L1/00
CPC classification number: H04L1/0061
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