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发明名称
Sound reproducing device
摘要
申请公布号
US1985390(A)
申请公布日期
1934.12.25
申请号
US19320603792
申请日期
1932.04.07
申请人
PATENT ENGINEERING CORPORATION
发明人
DEVENTER HARRY R. VAN
分类号
H04R17/00
主分类号
H04R17/00
代理机构
代理人
主权项
地址
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