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公开(公告)号：US2673240A
公开(公告)日：1954-03-23
申请号：US24134851
申请日：1951-08-10
Applicant: ZENITH RADIO CORP
Inventor： PULLES JAN H
IPC: H04N7/169
CPC classification number: H04N7/1693
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公开(公告)号：US2694103A
公开(公告)日：1954-11-09
申请号：US16858250
申请日：1950-06-16
Applicant: ZENITH RADIO CORP
Inventor： DRUZ WALTER S , PULLES JAN H
IPC: H04N7/169
CPC classification number: H04N7/1693
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