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发明名称
Sound record and its production
摘要
申请公布号
US2112699(A)
申请公布日期
1938.03.29
申请号
US19370136095
申请日期
1937.04.10
申请人
KLEBER JACKSON O
发明人
KLEBER JACKSON O.
分类号
G11B3/00
主分类号
G11B3/00
代理机构
代理人
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