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发明名称
Means for acoustical correction and sound deadening
摘要
申请公布号
US1758808(A)
申请公布日期
1930.05.13
申请号
US19270199026
申请日期
1927.06.15
申请人
SERSEN FRED J;CONGER JR KENYON B
发明人
SERSEN FRED J.;JR. KENYON B. CONGER,
分类号
G10K11/16
主分类号
G10K11/16
代理机构
代理人
主权项
地址
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