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经营范围
发明名称
Disk record and film record sound reproducer
摘要
申请公布号
US2519597(A)
申请公布日期
1950.08.22
申请号
US19430497590
申请日期
1943.08.06
申请人
OWENS FREEMAN H
发明人
OWENS FREEMAN H.
分类号
G11B25/10
主分类号
G11B25/10
代理机构
代理人
主权项
地址
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