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公开(公告)号：US2480364A
公开(公告)日：1949-08-30
申请号：US4531448
申请日：1948-08-20
Applicant: WESTERN ELECTRIC CO
Inventor： HANSEN CARL E , JUVINALL JAMES W
IPC: H01J5/26
CPC classification number: H01J5/26 , H01J2893/0043
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公开(公告)号：US2401930A
公开(公告)日：1946-06-11
申请号：US53322944
申请日：1944-04-28
Applicant: WESTERN ELECTRIC CO
Inventor： HANSEN CARL E
IPC: H01J5/28
CPC classification number: H01J5/28 , H01J2893/0044
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