-
公开(公告)号:US2521682A
公开(公告)日:1950-09-12
申请号:US2833448
申请日:1948-05-21
Applicant: STANDARD TELEPHONES CABLES LTD
Inventor: BACKER LYLE A , HAPPE JR WILLIAM H
IPC: H01J1/18
CPC classification number: H01J1/18
公开(公告)号:US2521682A
公开(公告)日:1950-09-12
申请号:US2833448
申请日:1948-05-21
Applicant: STANDARD TELEPHONES CABLES LTD
Inventor: BACKER LYLE A , HAPPE JR WILLIAM H
IPC: H01J1/18
CPC classification number: H01J1/18