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公开(公告)号：US3055465A
公开(公告)日：1962-09-25
申请号：US65049757
申请日：1957-04-03
Applicant: TELEFUNKEN GMBH
Inventor： HANS PULFRICH
CPC classification number: C04B37/026 , C04B2237/122 , C04B2237/125 , C04B2237/126 , C04B2237/341 , C04B2237/405 , C04B2237/407 , C04B2237/62 , C04B2237/64 , C04B2237/708 , C04B2237/76 , C04B2237/80 , H01J5/26 , H01J2893/0041 , Y10T403/217 , Y10T403/77
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