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公开(公告)号：US2357995A
公开(公告)日：1944-09-12
申请号：US38891241
申请日：1941-04-16
Applicant: ERICSSON TELEFON AB L M
Inventor： HUGO BLOMBERG KNUT , PERCY BROOME CARL LUDVIG , AXEL DAHLGREN FREDRIK , GOSTA JOHANSSON ARTUR , OLOF LUNDHOLM RAGNAR
IPC: H02J13/00
CPC classification number: H02J13/0048 , Y02B90/263 , Y04S40/123 , Y10T307/266
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