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公开(公告)号：US2787657A
公开(公告)日：1957-04-02
申请号：US8410449
申请日：1949-03-29
Applicant: INT STANDARD ELECTRIC CORP
Inventor： JOHN TERRY VICTOR , RIDLER DESMOND SYDNEY , WEIR DONALD ADAMS
CPC classification number: H04L1/248 , H04L5/16 , H04L25/12 , H04L25/245 , H04L43/50
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