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公开(公告)号：US1565600A
公开(公告)日：1925-12-15
申请号：US40685820
申请日：1920-08-30
Applicant: WESTERN ELECTRIC CO
Inventor： STOEKLE ERWIN R
IPC: H01J19/34
CPC classification number: H01J19/34 , H01J2893/0004
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公开(公告)号：US1353976A
公开(公告)日：1920-09-28
申请号：US8545716
申请日：1916-03-20
Applicant: WESTERN ELECTRIC CO
Inventor： STOEKLE ERWIN R
IPC: H01J19/02
CPC classification number: H01J19/02 , H01J2893/0001
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