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经营范围
发明名称
Automatic phonograph
摘要
申请公布号
US2521046(A)
申请公布日期
1950.09.05
申请号
US19450633418
申请日期
1945.12.07
申请人
DARWIN JOSEPH A
发明人
DARWIN JOSEPH A.
分类号
G11B17/30
主分类号
G11B17/30
代理机构
代理人
主权项
地址
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