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1.发明授权System for obtaining successive operation of the selecting magnets in crossbar switches 失效用于在交叉开关中获得选择磁铁的连续操作的系统
公开(公告)号：US2499542A
公开(公告)日：1950-03-07
申请号：US58684945
申请日：1945-04-06
Applicant: ERICSSON TELEFON AB L M
Inventor： HARRY THUNELL KARL , DANIEL VIGREN STEN
CPC classification number: H01H67/26 , H04Q3/0004
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