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经营范围
发明名称
Improvements in or relating to hearing appliances
摘要
申请公布号
GB365962(A)
申请公布日期
1932.01.28
申请号
GB19310017132
申请日期
1931.06.12
申请人
DEUTSCHE AKUSTIK G.M.B.H.
发明人
分类号
H04R25/02
主分类号
H04R25/02
代理机构
代理人
主权项
地址
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