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公开(公告)号：US3477051A
公开(公告)日：1969-11-04
申请号：US3477051D
申请日：1968-01-15
Applicant: IBM
Inventor： CLARK KENDALL , HERRMANN KARL E , KLEIN WILLIAM A
CPC classification number: C25D21/10 , C25D5/006 , C25D5/08 , C25D17/12 , H01F17/0033 , H01F17/06 , Y10T29/49073
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