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公开(公告)号：US1903493A
公开(公告)日：1933-04-11
申请号：US41067929
申请日：1929-11-30
Applicant: GEN TUBE LIGHTS CORP
Inventor： BECK LEO L , NOBLE AUBREY E
IPC: H01J17/00
CPC classification number: H01J17/00 , H01J2893/0064
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