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经营范围
发明名称
Portable electric automatic phonograph
摘要
申请公布号
US2115773(A)
申请公布日期
1938.05.03
申请号
US19370151410
申请日期
1937.07.01
申请人
ARTHUR HILL
发明人
HILL ARTHUR
分类号
G03B31/00
主分类号
G03B31/00
代理机构
代理人
主权项
地址
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