Patent search ap:("IBM") AND inv:"SULLIVAN JOHN J" Page 1

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发明授权
Electrical system 失效

公开(公告)号：US2531895A

公开(公告)日：1950-11-28

申请号：US59277845

申请日：1945-05-09

Applicant: IBM

Inventor： SHAFER ORVILLE B , SULLIVAN JOHN J

IPC: H01J17/30 , H01J17/56 , H03K17/52

CPC classification number: H01J17/30 , H01J17/56 , H03K17/52

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