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发明名称
Sound reproducing apparatus
摘要
申请公布号
US2080275(A)
申请公布日期
1937.05.11
申请号
US19350054211
申请日期
1935.12.13
申请人
ROCK-OLA MANUFACTURING CORPORATION
发明人
HUTTER WILLIAM H.
分类号
H04R1/28
主分类号
H04R1/28
代理机构
代理人
主权项
地址
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