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公开(公告)号：US3088998A
公开(公告)日：1963-05-07
申请号：US81618059
申请日：1959-05-27
Applicant: ERICSSON TELEFON AB L M
Inventor： KARLBY BERGMANN ANDERS , HARALD ELLDIN ANDERS , CHRISTIAN JACOBAEUS ANTON , GUNNAR SVALA CARL , EMIL WELANDER GUNNAR
IPC: H04Q11/04
CPC classification number: H04Q11/04
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