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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：US2146099A
公开(公告)日：1939-02-07
申请号：US14394637
申请日：1937-05-21
Applicant: PHILIPS NV
Inventor： DE BOER JAN HENDRIK , HAJO BRUINING , FRITS PRAKKE , GESSEL KAREL MARINUS VAN
CPC classification number: H01J9/125 , H01J1/32 , H01J2201/32
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