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公开(公告)号：US2482433A
公开(公告)日：1949-09-20
申请号：US69944046
申请日：1946-09-26
Applicant: ASEA AB
Inventor： JOHAN PERSSON GUNNAR
CPC classification number: H01J17/04 , C04B37/025 , C04B2237/10 , C04B2237/32 , C04B2237/40 , C04B2237/405 , C04B2237/592 , C04B2237/61 , C04B2237/62 , C04B2237/64 , C04B2237/76 , C04B2237/765 , C04B2237/78 , C04B2237/82 , C04B2237/84 , C04B2237/88 , Y10T403/21
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