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公开(公告)号：US1849056A
公开(公告)日：1932-03-15
申请号：US43597030
申请日：1930-03-14
Applicant: FOREST RADIO COMPANY DE
Inventor： CROWLEY SYLVESTER W
IPC: H01J9/38
CPC classification number: H01J9/38
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公开(公告)号：US1814770A
公开(公告)日：1931-07-14
申请号：US12683226
申请日：1926-08-03
Applicant: FOREST RADIO COMPANY DE
Inventor： SCHENK CARL R , CROWLEY SYLVESTER W
IPC: H01J19/00
CPC classification number: H01J19/00 , H01J2893/0026
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