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发明名称
PERFECCIONAMIENTO INTRODUCIDO EN LOS DISCOS FONOGRáFICOS
摘要
申请公布号
ES235815(A1)
申请公布日期
1958.05.16
申请号
ES19150002358
申请日期
1957.06.01
申请人
VALLS TROYA, JOSE
发明人
分类号
(IPC1-7):G10
主分类号
(IPC1-7):G10
代理机构
代理人
主权项
地址
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