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公开(公告)号：US3045067A
公开(公告)日：1962-07-17
申请号：US73285458
申请日：1958-05-05
Applicant: ERICSSON TELEFON AB L M
Inventor： EMIL NILSSON NILS , HAROLD BJORK JOHAN CARL , OSCAR RODNERT GUSTAV
CPC classification number: H04M3/523 , H04M1/65 , H04M3/54 , H04M15/08 , H04Q3/0004
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