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发明名称
Sound recording device
摘要
申请公布号
US1902290(A)
申请公布日期
1933.03.21
申请号
US19290408393
申请日期
1929.11.19
申请人
HARRISON PAGE MILTON
发明人
PAGE MILTON HARRISON
分类号
G11B7/00
主分类号
G11B7/00
代理机构
代理人
主权项
地址
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