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公开(公告)号:US2417551A
公开(公告)日:1947-03-18
申请号:US48529043
申请日:1943-05-01
Applicant: EMI LTD
Inventor: STANLEY HILL
IPC: H01J25/24
CPC classification number: H01J25/24
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公开(公告)号:US2606967A
公开(公告)日:1952-08-12
申请号:US62508645
申请日:1945-10-27
Applicant: EMI LTD
Inventor: JOHN COLLARD , STANLEY HILL
IPC: H01P1/04
CPC classification number: H01P1/042