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发明名称
Sound reproducing apparatus
摘要
申请公布号
US2063578(A)
申请公布日期
1936.12.08
申请号
US19340748793
申请日期
1934.10.18
申请人
ARTHUR BERGLUND
发明人
BERGLUND ARTHUR
分类号
A63H3/33;G11B33/06
主分类号
A63H3/33
代理机构
代理人
主权项
地址
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