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发明名称
Device for recording sound originating in the human body
摘要
申请公布号
US2073412(A)
申请公布日期
1937.03.09
申请号
US19330663674
申请日期
1933.03.31
申请人
BRUNO CAPPELLI
发明人
CAPPELLI BRUNO
分类号
G11B5/00
主分类号
G11B5/00
代理机构
代理人
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