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经营范围
发明名称
Improvements in electromagnetic pickups
摘要
申请公布号
GB418678(A)
申请公布日期
1934.10.29
申请号
GB19330012286
申请日期
1933.04.27
申请人
WILHELM MAX BRAUN
发明人
分类号
H04R11/08
主分类号
H04R11/08
代理机构
代理人
主权项
地址
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