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公开(公告)号：US2585057A
公开(公告)日：1952-02-12
申请号：US76701947
申请日：1947-08-07
Applicant: INT STANDARD ELECTRIC CORP
Inventor： ISIDORE VANGEEN ABRAHAM
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公开(公告)号：US2581460A
公开(公告)日：1952-01-08
申请号：US76701847
申请日：1947-08-07
Applicant: INT STANDARD ELECTRIC CORP
Inventor： ISIDORE VANGEEN ABRAHAM
IPC: H01J43/28
CPC classification number: H01J43/28
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