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公开(公告)号：US3270143A
公开(公告)日：1966-08-30
申请号：US28292663
申请日：1963-05-24
Applicant: BELL TELEPHONE LABOR INC
Inventor： GERMOND PAUL J , LASWELL JESSE C , SEWARD DOUGLAS T
IPC: H04Q1/45
CPC classification number: H04Q1/45
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