Patent search ap:("BELLETT GEORGE R") AND inv:"BELLETT GEORGE R" Page 1

1.

发明授权
Constant plate current electron tube 失效
Title translation: 恒板电流电子管

公开(公告)号：US2877381A

公开(公告)日：1959-03-10

申请号：US49829555

申请日：1955-03-31

Applicant: BELLETT GEORGE R

Inventor： BELLETT GEORGE R

IPC: H01J1/13 , H01J1/15 , H01J21/02

CPC classification number: H01J21/02 , H01J1/13 , H01J1/15

Patent Agency Ranking