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公开(公告)号：US3335230A
公开(公告)日：1967-08-08
申请号：US34498064
申请日：1964-02-14
Applicant: BELL TELEPHONE LABOR INC
Inventor： RETTIG JOHN F , RIEDEL NELSON A , STAGG JR UBERTO K , TRAUMBULL ALLAN R
IPC: H04Q3/00
CPC classification number: H04Q3/0004
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