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发明名称
Acoustical device
摘要
申请公布号
US2991333(A)
申请公布日期
1961.07.04
申请号
US19600053708
申请日期
1960.09.02
申请人
MAICO ELECTRONICS, INC.
发明人
ROSE JOHN F.
分类号
H04R25/02
主分类号
H04R25/02
代理机构
代理人
主权项
地址
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