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发明名称
Recording disk for sound and pictures
摘要
申请公布号
US2455712(A)
申请公布日期
1948.12.07
申请号
US19470730837
申请日期
1947.02.25
申请人
VON SODEN ADOLPH F
发明人
SODEN ADOLPH F. VON
分类号
H04N5/85
主分类号
H04N5/85
代理机构
代理人
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地址
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