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发明名称
Duplex horn for sound reproducers
摘要
申请公布号
US1760284(A)
申请公布日期
1930.05.27
申请号
US19220539366
申请日期
1922.02.27
申请人
RADIO CORPORATION
发明人
REHFIELD GROVER G.
分类号
G11B33/02
主分类号
G11B33/02
代理机构
代理人
主权项
地址
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