Patent search ap:("IBM") AND inv:"JACKSON CHAUNCEY D" Page 1

1.

发明授权
Electromagnetic eraser 失效
Title translation: 电磁橡皮擦

公开(公告)号：US2975239A

公开(公告)日：1961-03-14

申请号：US47755354

申请日：1954-12-24

Applicant: IBM

Inventor： JACKSON CHAUNCEY D , BATCHELOR WILLIAM L , THOMPSON DONALD B

IPC: G11B5/004 , G11B5/024 , G11B5/265

CPC classification number: G11B5/004 , G11B5/024 , G11B5/265

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