Patent search ap:("RCA CORP") AND inv:"ASHMUN MORTON GEORGE" Page 1

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发明授权
Electron discharge device 失效

公开(公告)号：US2271985A

公开(公告)日：1942-02-03

申请号：US29297139

申请日：1939-09-01

Applicant: RCA CORP

Inventor： ASHMUN MORTON GEORGE

IPC: H01J29/84 , H01J43/08

CPC classification number: H01J29/84 , H01J43/08

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