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发明名称
Sound reproducing system
摘要
申请公布号
US2008712(A)
申请公布日期
1935.07.23
申请号
US19330703340
申请日期
1933.12.21
申请人
HAMMOND JR JOHN HAYS
发明人
JR. JOHN HAYS HAMMOND,
分类号
H04S3/00
主分类号
H04S3/00
代理机构
代理人
主权项
地址
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