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公开(公告)号：US3246240A
公开(公告)日：1966-04-12
申请号：US19339862
申请日：1962-05-09
Applicant: IBM
Inventor： ARNOLD JOHN A , DAVID GORDON , KUTCHER MYRON M
IPC: G01R31/04
CPC classification number: G01R31/041
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公开(公告)号：US3238449A
公开(公告)日：1966-03-01
申请号：US16244261
申请日：1961-12-27
Applicant: IBM
Inventor： DAVID GORDON , SANBORN MALCOLM A
CPC classification number: H03M1/00 , G01R33/1207 , H03M1/124
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