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发明名称
Phonograph disk
摘要
申请公布号
US1812550(A)
申请公布日期
1931.06.30
申请号
US19290376698
申请日期
1929.07.08
申请人
ALVARES PENTEADO ARMANDO
发明人
PENTEADO ARMANDO ALVARES
分类号
G11B3/60
主分类号
G11B3/60
代理机构
代理人
主权项
地址
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