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公开(公告)号：US3259697A
公开(公告)日：1966-07-05
申请号：US24060162
申请日：1962-11-28
Applicant: BELL TELEPHONE LABOR INC
Inventor： BRUMFIELD GRAYSON E , MORSE CHARLES E , SMITH JOHN P
IPC: H04Q3/00
CPC classification number: H04Q3/00
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