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公开(公告)号：US2852611A
公开(公告)日：1958-09-16
申请号：US40676654
申请日：1954-01-28
Applicant: INT STANDARD ELECTRIC CORP
Inventor： ROGER AIGRAIN PIERRE RAOUL , GEORGES POULOT-INTZOPOULOS
IPC: H04Q11/04
CPC classification number: H04Q11/04
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