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公开(公告)号:US2290582A
公开(公告)日:1942-07-21
申请号:US30172839
申请日:1939-10-28
Applicant: RCA CORP
Inventor: DONAL JR JOHN S
IPC: H04N5/74
CPC classification number: H04N5/7425
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公开(公告)号:US2189340A
公开(公告)日:1940-02-06
申请号:US19927338
申请日:1938-03-31
Applicant: RCA CORP
Inventor: DONAL JR JOHN S
IPC: H01J29/41
CPC classification number: H01J29/416
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