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发明名称
Sound reproducing device
摘要
申请公布号
US1853850(A)
申请公布日期
1932.04.12
申请号
US19280328141
申请日期
1928.12.24
申请人
GENERAL TALKING PICTURES CORPORATION
发明人
FOREST LEE DE
分类号
H04R1/26
主分类号
H04R1/26
代理机构
代理人
主权项
地址
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