Patent search ap:("IBM") AND inv:"DODGE WILLIAM W" Page 1

1.

发明授权
Magnetic recording and reproducing system 失效
Title translation: 磁记录和再现系统

公开(公告)号：US2952010A

公开(公告)日：1960-09-06

申请号：US70606257

申请日：1957-12-30

Applicant: IBM

Inventor： DEMER FREDERICK M , DODGE WILLIAM W , STOCKDALE NORMAN S

IPC: G06K13/28 , G11B5/52 , G11B15/18 , G11B15/43 , G11B15/58 , G11B15/60

CPC classification number: G11B15/43 , G06K13/28 , G11B5/52 , G11B15/1808 , G11B15/58 , G11B15/60

Patent Agency Ranking