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公开(公告)号：US2403745A
公开(公告)日：1946-07-09
申请号：US51518943
申请日：1943-12-21
Applicant: EITEL MCCULLOUGH INC
Inventor： LEIGH NORTON ROBERT
IPC: H01J9/385
CPC classification number: H01J9/385
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公开(公告)号：US2431767A
公开(公告)日：1947-12-02
申请号：US49890843
申请日：1943-08-14
Applicant: EITEL MCCULLOUGH INC
Inventor： MURDOCK CLAYTON E , LEIGH NORTON ROBERT
IPC: H01J19/42
CPC classification number: H01J19/42 , H01J2893/0002
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