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公开(公告)号：US2474810A
公开(公告)日：1949-07-05
申请号：US73643447
申请日：1947-03-22
Applicant: INT STANDARD ELECTRIC CORP
Inventor： MAURICE ARDITI , HAROLD FRANZEL IRWIN , JOSEPH FELNSTEIN
IPC: H04J3/04
CPC classification number: H04J3/045
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