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发明名称
Amplifying horn
摘要
申请公布号
US1811598(A)
申请公布日期
1931.06.23
申请号
US19270234486
申请日期
1927.11.19
申请人
TEMPLE, INC.
发明人
TEMPLE FRED W.
分类号
G10K11/02
主分类号
G10K11/02
代理机构
代理人
主权项
地址
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