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公开(公告)号：US3373307A
公开(公告)日：1968-03-12
申请号：US41065564
申请日：1964-11-12
Applicant: PHILIPS CORP
Inventor： PIETER ZALM , CATHARINA SPRENGERS JOHANNES W , STRATUM ANTONIUS JOHANNES ALBE , DER LINDEN PETRUS CORNELIS VAN
IPC: H01J1/28
CPC classification number: H01J1/28 , Y10T428/12042 , Y10T428/12056
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