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公开(公告)号：US2159774A
公开(公告)日：1939-05-23
申请号：US19594238
申请日：1938-03-15
Applicant: PHILIPS NV
Inventor： FREDERIK VEENEMANS CORNELIS , HEINRICH LOPP EDMUND , HAJO BRUINING
CPC classification number: H01J9/125 , H01J1/32 , H01J2201/32
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公开(公告)号：US2151783A
公开(公告)日：1939-03-28
申请号：US14958237
申请日：1937-06-22
Applicant: PHILIPS NV
Inventor： HEINRICH LOPP EDMUND , MARIE ADRIANUS JOHANNES WILHEL
IPC: H01J43/02
CPC classification number: H01J43/02
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