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经营范围
发明名称
Automatic phonograph
摘要
申请公布号
US1802152(A)
申请公布日期
1931.04.21
申请号
US19250024096
申请日期
1925.04.18
申请人
MARR WILLIAM H
发明人
MARR WILLIAM H.
分类号
G11B17/04
主分类号
G11B17/04
代理机构
代理人
主权项
地址
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