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公开(公告)号：US3131264A
公开(公告)日：1964-04-28
申请号：US10085561
申请日：1961-04-05
Applicant: INT STANDARD ELECTRIC CORP
Inventor： SIDNEY CHITTLEBURGH WILLIAM FR , SIDNEY SIMMONDS ERNEST
IPC: H04Q1/453
CPC classification number: H04Q1/453
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