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公开(公告)号：US2435410A
公开(公告)日：1948-02-03
申请号：US66002446
申请日：1946-04-06
Applicant: DURO TEST CORP
Inventor： SIMSON WALTER H
IPC: F21V23/02
CPC classification number: F21V23/02
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公开(公告)号：US3504218A
公开(公告)日：1970-03-31
申请号：US3504218D
申请日：1969-01-03
Applicant: DURO TEST CORP
Inventor： EMIDY THOMAS J , SIMSON WALTER H , THORINGTON LUKE
IPC: H01J61/067 , H01J61/54 , H01J17/06 , H01J61/08
CPC classification number: H01J61/0672 , H01J61/545
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