Patent search ap:("COSSOR LTD A C") AND inv:"CECIL PHIPPS DARRELL" Page 1

1.

发明授权
Thermionic cathode 失效
Title translation: 热阴极

公开(公告)号：US2507812A

公开(公告)日：1950-05-16

申请号：US68988146

申请日：1946-08-12

Applicant: COSSOR LTD A C

Inventor： CECIL PHIPPS DARRELL

IPC: H01J1/20 , H01J3/02 , H01J29/04

CPC classification number: H01J29/04 , H01J1/20 , H01J3/027 , Y10T29/4992 , Y10T403/4634

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