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发明名称
Acoustic device
摘要
申请公布号
US2312534(A)
申请公布日期
1943.03.02
申请号
US19420430448
申请日期
1942.02.11
申请人
FLENE HENRY D
发明人
FLENE HENRY D.
分类号
A61F11/00
主分类号
A61F11/00
代理机构
代理人
主权项
地址
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