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发明名称
Device for reproducing sounds
摘要
申请公布号
GB301922(A)
申请公布日期
1930.05.07
申请号
GB19280036155
申请日期
1928.12.07
申请人
VIKTOR HOENIGMANN
发明人
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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