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1.发明授权
公开(公告)号：US3180020A
公开(公告)日：1965-04-27
申请号：US18735162
申请日：1962-04-13
Applicant: RCA CORP
Inventor： ALLEN WILLIAM W , RAOUL LARSON ERNST
CPC classification number: C04B37/026 , C04B2237/122 , C04B2237/123 , C04B2237/124 , C04B2237/32 , C04B2237/403 , C04B2237/62 , C04B2237/72 , C04B2237/765 , C04B2237/84 , H01J19/46 , H01J2893/0006
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