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公开(公告)号：US3480409A
公开(公告)日：1969-11-25
申请号：US3480409D
申请日：1966-10-03
Applicant: BELL TELEPHONE LABOR INC
Inventor： DILLON JOSEPH F JR , CRAW ROY CONWAY LE , PHILIPSBORN HENNING VON , WERNICK JACK H
CPC classification number: H01F1/40 , C30B9/00 , C30B29/48 , G02F1/0036
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