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公开(公告)号：US2613324A
公开(公告)日：1952-10-07
申请号：US12744849
申请日：1949-11-15
Applicant: CONS ENG CORP
Inventor： PERKINS GEORGE D , ROBINSON CHARLES F
IPC: H01J49/02
CPC classification number: H01J49/022
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公开(公告)号：US2613323A
公开(公告)日：1952-10-07
申请号：US12744749
申请日：1949-11-15
Applicant: CONS ENG CORP
Inventor： PERKINS GEORGE D
IPC: H01J49/02
CPC classification number: H01J49/022
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