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1.发明授权Recording and playback system incorporating a first character positioning system 失效记录和回放系统并入第一个字符定位系统
公开(公告)号：US3523287A
公开(公告)日：1970-08-04
申请号：US3523287D
申请日：1968-01-15
Applicant: IBM
Inventor： MORRISON DONALD J , TANNER HOWARD C
CPC classification number: G11B20/1215 , G11B20/1419 , G11B20/1816
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