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公开(公告)号：US3230313A
公开(公告)日：1966-01-18
申请号：US20042162
申请日：1962-06-06
Applicant: BELL TELEPHONE LABOR INC
Inventor： GEORGE FISHMAN , LE CRONIER RICHARD E , ZEBE CHARLES W
IPC: H04Q3/00
CPC classification number: H04Q3/0004
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