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公开(公告)号：US1632615A
公开(公告)日：1927-06-14
申请号：US71795124
申请日：1924-06-05
Applicant: GEN ELECTRIC
Inventor： MITCHELL LORIS E , WHITE ARTHUR J
IPC: H01J7/18
CPC classification number: H01J7/186
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公开(公告)号：US1748026A
公开(公告)日：1930-02-18
申请号：US20070527
申请日：1927-06-22
Applicant: GEN ELECTRIC
Inventor： MITCHELL LORIS E
IPC: H01J21/02
CPC classification number: H01J21/02
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