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公开(公告)号：US3014089A
公开(公告)日：1961-12-19
申请号：US82910259
申请日：1959-07-23
Applicant: ZENITH RADIO CORP
Inventor： EILERS CARL G
IPC: H04N7/167
CPC classification number: H04N7/167
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公开(公告)号：US2673239A
公开(公告)日：1954-03-23
申请号：US24101251
申请日：1951-08-09
Applicant: ZENITH RADIO CORP
Inventor： EILERS CARL G
IPC: H04N7/169
CPC classification number: H04N7/1693
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