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公开(公告)号：US2424293A
公开(公告)日：1947-07-22
申请号：US52565944
申请日：1944-03-09
Applicant: WESTINGHOUSE ELECTRIC CORP
Inventor： WATROUS JR WARD W
IPC: H01J1/22
CPC classification number: H01J1/22
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公开(公告)号：US2415980A
公开(公告)日：1947-02-18
申请号：US47849543
申请日：1943-03-09
Applicant: WESTINGHOUSE ELECTRIC CORP
Inventor： WATROUS JR WARD W
IPC: H01J17/54
CPC classification number: H01J17/54
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