Patent search ap:("RCA CORP") AND inv:"HARMEN REERINK ENGBERT" Page 1

1.

发明授权
Wehnelt-cathode 失效
Title translation: Wehnelt阴极

公开(公告)号：US1821359A

公开(公告)日：1931-09-01

申请号：US35259729

申请日：1929-04-04

Applicant: RCA CORP

Inventor： HARMEN REERINK ENGBERT , WILHELM MULDER JOHANNES GIJSBE

IPC: H01J1/14 , H01J9/04

CPC classification number: H01J1/14 , H01J9/042

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