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发明名称
Electric phonograph
摘要
申请公布号
US2680786(A)
申请公布日期
1954.06.08
申请号
US19500163934
申请日期
1950.05.24
申请人
IRVING SEIDMAN
发明人
CHALFIN NORMAN L.
分类号
主分类号
代理机构
代理人
主权项
地址
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