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公开(公告)号：US1990147A
公开(公告)日：1935-02-05
申请号：US57961931
申请日：1931-12-07
Applicant: GEN ELECTRIC
Inventor： SHIRO TACHIBANA
IPC: H01J61/10
CPC classification number: H01J61/10
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公开(公告)号：US1990146A
公开(公告)日：1935-02-05
申请号：US56583731
申请日：1931-09-29
Applicant: GEN ELECTRIC
Inventor： SHIRO TACHIBANA
IPC: H01J17/00
CPC classification number: H01J17/00 , H01J2893/0064
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