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发明名称
Photoelectric sound reproducer
摘要
申请公布号
US2272795(A)
申请公布日期
1942.02.10
申请号
US19400325373
申请日期
1940.03.22
申请人
RADIO CORPORATION
发明人
DIMMICK GLENN L.
分类号
G11B7/14
主分类号
G11B7/14
代理机构
代理人
主权项
地址
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