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公开(公告)号：US3513263A
公开(公告)日：1970-05-19
申请号：US67937567
申请日：1967-10-31
Applicant: IBM
Inventor： BASTIAN MICHEL , CHU PE PSI , CORBY BERNARD , JAMES ANDRE , BLANC ROBERT LE , MILEWSKI ANDRZEJ
CPC classification number: H04Q3/545
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