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1.发明授权Ferromagnetic screening caps and demagnetizing coils for color picture tubes having rectangular display screens 失效具有矩形显示屏的彩色显像管的铁磁屏蔽帽和去磁线圈
公开(公告)号：US3340417A
公开(公告)日：1967-09-05
申请号：US51931966
申请日：1966-01-07
Applicant: PHILIPS CORP
IPC: H01J29/00
CPC classification number: H01J29/003 , H01J2229/003 , H01J2229/0053
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