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公开(公告)号：US2111397A
公开(公告)日：1938-03-15
申请号：US8690636
申请日：1936-06-24
Applicant: RCA CORP
Inventor： HOLMES RALPH S
IPC: H03H7/01
CPC classification number: H03H7/0176
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公开(公告)号：US2092373A
公开(公告)日：1937-09-07
申请号：US71328034
申请日：1934-02-28
Applicant: RCA CORP
Inventor： HOLMES RALPH S
IPC: H01J29/98
CPC classification number: H01J29/98
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