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公开(公告)号：US2820487A
公开(公告)日：1958-01-21
申请号：US57053156
申请日：1956-03-09
Applicant: GEN ELECTRIC
Inventor： BAHM EDWARD L
IPC: H01J19/00
CPC classification number: H01J19/00 , H01J2893/0025
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公开(公告)号：US3498818A
公开(公告)日：1970-03-03
申请号：US3498818D
申请日：1968-01-23
Applicant: GEN ELECTRIC
Inventor： BAHM EDWARD L , PEABODY IRVIN C , VEDDER WILLEM
CPC classification number: C23C14/541 , C23C14/02 , C23C14/18
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