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公开(公告)号：US3462557A
公开(公告)日：1969-08-19
申请号：US3462557D
申请日：1965-12-27
Applicant: BELL TELEPHONE LABOR INC
Inventor： BROOKS CHESTER E , HENRY JAMES L , LINHART PETER B , MARKTHALER GRACE E , MASSONI DONALD R , MEYERLE JOHN A
CPC classification number: H04Q3/0004
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